Kreg 320 Review: Is This Pocket-Hole Jig Worth Buying?
What's inside
- What the Kreg 320 is designed to do
- Material capacity: where the Kreg 320 works best
- Drilling-angle accuracy and joint quality
- Clamp setup: the main trade-off
- Portability and everyday handling
- Performance on common board thicknesses
- Kreg 320 buying decision by situation
- Durability, maintenance, and common mistakes
- Final verdict
- What the Kreg 320 is designed to do
- Material capacity: where the Kreg 320 works best
- Drilling-angle accuracy and joint quality
- Clamp setup: the main trade-off
- Portability and everyday handling
- Performance on common board thicknesses
- Kreg 320 buying decision by situation
- Durability, maintenance, and common mistakes
- Final verdict
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Yes—the Kreg 320 is worth buying if you want an inexpensive, portable pocket-hole jig for occasional furniture repairs, cabinets, shelving, and small projects, but it is not the fastest choice for repetitive production work. Its two-guide layout, 15-degree drilling angle, and support for common 1/2-, 3/4-, and 1 1/2-inch stock make it more capable than a basic single-guide jig, while its manual clamping setup is the main compromise.
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Contents
- What the Kreg 320 is designed to do
- Material capacity: where the Kreg 320 works best
- Drilling-angle accuracy and joint quality
- Clamp setup: the main trade-off
- Portability and everyday handling
- Performance on common board thicknesses
- Kreg 320 buying decision by situation
- Durability, maintenance, and common mistakes
- Final verdict
What the Kreg 320 is designed to do
The Kreg 320 is a compact pocket-hole jig that positions a stepped drill bit at the standard 15-degree pocket-hole angle. It uses interchangeable guide spacing rather than a permanently fixed three-hole body, so you can create one or two holes depending on the width of the workpiece.
Its most useful feature is not a higher drilling speed; it is the ability to set the jig for several common material thicknesses without buying separate guide blocks. The included thickness setting system helps position both the drill-bit stop collar and the jig for the workpiece being joined.
| Feature | Kreg 320 specification or practical range | Why it matters |
|---|---|---|
| Drilling angle | 15 degrees | Creates a compact pocket suitable for face-frame, cabinet, and general carpentry joints |
| Material thickness settings | 1/2, 3/4, and 1 1/2 inches | Covers common plywood, solid lumber, and thicker construction stock |
| Guide configuration | Two removable drill guides | Allows two-hole joints and flexible positioning across different board widths |
| Clamp method | Manual clamp through the jig’s clamp opening or adapter | Secure, but slower than an integrated toggle or automatic clamp |
| Drive size | Square-drive pocket-hole screws, typically #2 | Reduces cam-out compared with many Phillips-drive screws |
| Portability | Small, lightweight, and suitable for a tool bag or drawer | Useful for repairs, installation work, and projects away from a workshop |
Material capacity: where the Kreg 320 works best
The three principal settings are the reason the Kreg 320 is useful for general woodworking. The 1/2-inch setting suits thinner plywood and panel material. The 3/4-inch setting is the everyday choice for cabinet sides, shelves, face-frame parts, and most nominal 1-by lumber. The 1 1/2-inch setting is intended for thicker stock, such as joined 2-by material or thick solid-wood components.
Remember that nominal lumber dimensions are not actual dimensions. A nominal 1-by board is commonly about 3/4 inch thick, so it normally uses the 3/4-inch setting. A nominal 2-by board is commonly about 1 1/2 inches thick, matching the largest standard setting.
Material thickness should be measured rather than guessed when using surfaced lumber, plywood with unusual veneers, or stock that has been heavily planed. A setting that is only slightly wrong can place the screw too close to the face, leave the pocket too shallow, or cause the screw point to emerge from the opposite side.
Drilling-angle accuracy and joint quality
The Kreg 320’s 15-degree guides provide consistent hole direction as long as the jig is held firmly against the board. The guide sleeves keep the stepped bit aligned, while the depth collar limits how far the bit travels. This is accurate enough for normal cabinet, shelving, face-frame, and box construction.
Accuracy depends more on setup than on the stated angle. The board must sit flat against the jig’s base, the jig must be clamped without a gap, and the bit collar must be positioned for the actual thickness. If a board is cupped or the jig is allowed to shift, both holes can be consistently wrong even though the guide itself is sound.
On 3/4-inch stock, use the appropriate thickness setting and the matching screw length recommended by Kreg’s chart. For a typical 3/4-inch-to-3/4-inch joint, 1 1/4-inch pocket-hole screws are commonly used. Use coarse-thread screws in softwoods and plywood, and fine-thread screws in hardwoods. The screw choice affects holding power and whether the threads split the material; it is not merely a matter of convenience.
Clamp setup: the main trade-off
The Kreg 320 does not provide the same one-motion workflow as Kreg’s larger jigs with integrated toggle clamps. You position the jig, place the clamp through its clamping point or use a compatible clamp and adapter, then tighten it before drilling. That adds a few seconds to each repositioning cycle.
The manual setup is perfectly manageable for a small project. It becomes noticeable when drilling dozens of holes for a long bookcase, a run of cabinet frames, or a batch of drawer boxes. A face clamp with a suitable pad can make the process more repeatable, but it adds to the total cost and occupies more room in a small tool kit.
A reliable setup sequence
- Measure the workpiece and select the 1/2-, 3/4-, or 1 1/2-inch setting.
- Set the drill-bit stop collar using the supplied gauge or the manufacturer’s thickness chart.
- Place the guide and spacer so the holes are centered across the board’s width.
- Seat the board completely against the jig and its stop surfaces.
- Clamp the jig tightly enough that it cannot slide, but do not crush soft plywood.
- Drill at a steady speed, clearing chips if the material is dense or the hole is deep.
- Drive the screw with a square-drive bit and stop when the joint closes; excessive torque can strip the pocket or split the board.
For a narrow rail, one centered pocket hole may be enough. For wider rails, two holes spread across the width usually reduce twisting. Avoid placing holes so close to an end or edge that the screw weakens the remaining material.
Portability and everyday handling
Portability is one of the Kreg 320’s strongest advantages. Unlike a large benchtop jig, it can travel in a small toolbox and can be used on a workpiece that is already installed, provided there is room to clamp the jig. It is particularly convenient for adding a pocket hole during an on-site repair or joining parts too large to bring to a bench.
The small footprint also makes storage simple. The downside is that the jig offers less built-in support for long boards. When drilling wide panels or long rails, support the workpiece separately so its weight does not pull the jig out of alignment.
Performance on common board thicknesses
1/2-inch plywood
The 1/2-inch setting works for thin panels, but this is the thickness that demands the most care. Use the correct short screw and keep the screw centered. A long screw can break through the face, while overtightening can deform the plywood layers. Pocket holes are usually strongest when the screw pulls into a solid edge or frame member rather than relying on a thin panel edge alone.
3/4-inch lumber and plywood
This is the Kreg 320’s sweet spot. It handles common cabinet parts, shelves, small tables, and face frames with predictable results. The material is thick enough to accept a practical pocket and long enough screw without leaving much exposed on the front face.
1 1/2-inch stock
The largest setting is useful for nominal 2-by lumber and thick hardwood components. Check the screw length and the joint layout carefully, particularly near ends. A pocket hole can be strong in thick stock, but it does not replace good long-grain glue contact, accurate cutting, or adequate support in a heavily loaded structure.
Kreg 320 buying decision by situation
| Your situation | Verdict | Reason |
|---|---|---|
| First pocket-hole jig on a limited budget | Good choice | Provides the essential guides and common thickness settings without a large benchtop system |
| Occasional repairs or weekend projects | Very good choice | Compact storage and sufficient accuracy matter more than fast repositioning |
| Small workshop with little bench space | Good choice | Can be stored in a drawer and clamped only when needed |
| Repeated cabinet or production work | Consider a larger jig | An integrated clamp and more built-in support reduce setup time per hole |
| Mostly unusual thicknesses | Check compatibility first | The standard settings are convenient, but they do not cover every custom board thickness |
Durability, maintenance, and common mistakes
The drill guides and the stepped bit are the parts most likely to show wear. Replace or sharpen the bit when it begins to burn wood, requires excessive pressure, or leaves ragged pockets. A dull bit increases heat and can make the jig feel inaccurate even when the guide is still in good condition.
Brush or blow chips away from the guide openings after use, and keep the clamp surfaces free of sawdust. Do not hammer the drill bit through the guide, and avoid side-loading the bit while it is spinning. If the plastic body develops a crack or the guide sleeve becomes loose, replace the damaged component rather than relying on a visibly shifting guide.
Typical ownership cost is modest, but remember to budget for pocket-hole screws, a compatible clamp if you do not already own one, and replacement bits over time. A general market price in 2026 is usually in the lower budget-to-midrange category, varying with whether the package includes screws, a clamp, or additional accessories.
Final verdict
The Kreg 320 is worth buying for woodworkers who need accurate pocket holes in common 1/2-, 3/4-, and 1 1/2-inch material, especially when portability and low storage space matter. Its 15-degree guides are dependable, its two-guide layout is flexible, and its 3/4-inch performance fits the majority of household woodworking projects.
Choose a larger integrated-clamp jig instead if you will drill hundreds of holes, need rapid repeatability, or regularly work with long boards without a separate support system. For occasional furniture, cabinets, repairs, and beginner projects, the Kreg 320 delivers the useful part of a pocket-hole system without taking over the workshop.
