Precisely Determine Joint Sizes Without Fussy Measuring.
Gap Gauges, Can’t Miss Sizing Tools for Common Woodworking Joints. With Gap Gauge Tool, just one step to make simple joints! And you can leave your ruler in your pocket. Seriously!
The genius of our Gap Gauge tools is that by quickly gauging either the thickness of material or inside dimension of a joint, the opposite end of the Gap Gauge is perfectly set to the required size for the other half of the joint.
Pare a Tenon to Perfection. Use the fingers end of the Mini Gap Gauge to gauge the width of your mortise. Presto, the opposite end is set to the exact thickness to pare your tenon for the perfect fit. Of course, you can also use the fingered end of either Gap Gauge tool to establish the width of a dado or groove should you want to plane stock to a precise thickness.
With Gap Gauge, getting a perfect dado stack setup is usually a one test-cut affair– and here’s why. Set Gap Gauge to the thickness of your material. Then use that thickness setting to accurately set the dado stack. Done! Multiple trial and error cuts and the hassle of adding or eliminating shims are virtually eliminated. And who cares if that plywood is 23/32” +/- 1/64”. Gap Gauge gets it right regardless!
Why You Need Both. The full-sized Gap Gauge is best used for longer joints like dados and grooves. It's near 3” width provides a longer reference surface and thereby greater accuracy. The Sandard Gap Gauge shines when used for mortise & tenons. It’s 3/4" width allows accurate settings even in small mortises. Both Gap Gauges can be set in a range between 1/8" and 1-1/8".