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The self-centering feature of this jig puts the holes exactly in the center of the board.

The convenient positioning marks allow you to align it easily -board to board.
Removeable, hardened bushings are included:
2 x 1/4”
2 x
5/16”
2 x
3/8”
These bushings are interchangeable in 2 other threaded holes in the guide.
In case bushings get lost, we keep replacements in all three sizes in stock - click here.
The 7/16” and 1/2” are machined directly in the self entering steel block of the jig. These two permanent holes will guide 7/16” and 1/2” drill bits.

Accommodates wood up to 2” thick.
Hardened guides for long life.