Rockler - Insty Bit Tenon-Lok - Fine Woodworking Tool Review
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Insty Bit Tenon-Lok

Rockler - Insty Bit Tenon-Lok

When the Tenon-Lok bit is pushed against the bottom of a previously drilled hole, winged cutters deploy, creating the dovetail shape that locks in the tenon.

$19 to 22 (As of 2/11/2010)

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Editor's Review:

by Ernie Conover

review date: February 11, 2010

The joint where a chair leg meets a stretcher gets a lot of stress and when it breaks, a long-lasting repair is challenging. But the Insty Bit Tenon-Lok promises to make this high-stress joint stronger from the start as well as fixing old chairs for good.

The heart of the system is a clever bit sized from 1/2 in. to 1 in. ($19 to $22) with two spring-loaded cutters. You first drill a straight, flat-bottomed hole, and then use the Tenon-Lok bit to flare the bottom. A sharpened piece of steel tubing, called a Wedge Ring ($5 to $8 for 12), is driven in as the stretcher is pounded home, creating a dovetailed tenon that locks inside the flared hole. Seating the wedge ring requires some force, but once you do, your chair will stand up to just about anything.

Editor Test Results:

Quality of Cut Good

Manufacturer Specifications

Manufacturer Rockler
Manufacturer's Web Site
Manufacturer's Phone Number 800-279-4441
Size 1/2 in. to 1 in.

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