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Kerfline

No. 03

The Brace

BIT BRACE · 10-IN SWEEP · RATCHET

BORING · DEEP HOLES

A cranked sweep and a ratchet head — it drives an auger with torque a drill can’t touch.

The Brace — plan-sheet cast

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  1. 1Sweep (crank)
  2. 2Chuck & jaws

Bench spec

Sweep
10 in torque radius
Chuck
2-jaw, tapered shank
Head
Free-spinning pad
Best for
Auger boring, deep

On the bench

The brace multiplies torque through the radius of its sweep, so a lead-screw auger bit pulls itself into hardwood faster than a powered drill of the same effort. Flip the cam ratchet and you can bore in a corner where the crank can’t make a full turn; palm the free-spinning head and keep your weight behind it to hold the bit square.

Common miss · ✗

Letting the bit skate

Start the lead screw square and let it bite; lean the pad-head off-axis and the auger walks and bores an oval.

Take it further

Read the deeper field guides, compare vetted picks, or carry the drawing as original merch in the shop.