Skip to content
Square Hand Brace Adapters for Auger Boring Bits with 1/4", 9 mm and 7/16" Shafts

Square Hand Brace Adapters for Auger Boring Bits with 1/4", 9 mm and 7/16" Shafts

by Taytools
$13.99 - $19.99
$19.99
$19.99
$9.79 - $19.99
$19.99
SKU TTDBA01_Kit

The hand brace is an essential and versatile tool that should be in every shop. In many instances, a hand brace can bore holes at precise angles and depths more easily and accurately than a cordless drill. However, the problem with using a hand brace is that the selection of quality square shank bits is quite limited. Used vintage bits can be found at swap meets or online, but their quality can be quite variable, and they will likely need sharpening. New bits can be quite expensive, and their quality is often poor or inconsistent.

Then, we discovered WoodOwl Tri-Cut Ultra Smooth Auger Bits. These bits cut with less effort than any bit we tested and produced smooth holes with minimal to no blowout. Plus, these bits are very reasonably priced. The only barrier to using WoodOwl bits was the 7/16” hex shaft, which did not interface with most brace chucks. So, we had an adapter made to address this problem. Our adapter has one end with a round hole that accepts 7/16” hex shanks, and the other end is square and tapered, fitting perfectly in any hand brace chuck. Bits are secured in place via a T knob. The adapter comes with just one knob. This adapter will allow the use of any WoodOwl Tri-Cut Ultra Smooth bit in your hand brace. 100% made in the USA!

 Specs for 7/16" round hole adapter:

  • Precision turned on a CNC lathe from tool steel
  • Shaft is round and not hex 
  • Overall length: 4.25”
  • Depth of hole: 1.25”
  • Outside diameter: .75”
  • 10-32 x 3/8" T knob with stainless steel threads  
  • Distance of screw hole from end: .625”
  • Blackened gun metal finish 

See the full selection of Tri-Cut Ultra Smooth WoodOwl bits HERE.

We also carry 2 additional imported sizes to fit 1/4" (6.35mm) and 3/8" (9mm) hex shafts

Adapter that accepts 1/4" (6,35mm) hex shafts: 

  • Hex hole
  • Depth of hole: .820" 
  • Screw position: .275: from end 
  • Outside diameter: .550"
  • Overall length: 4.5" 
  • Chrome finish
  • Secured with round knurled blackened steel knob 

Adapter that accepts 9mm hex shafts:

  • Hex hole
  • Depth of hole: .820" 
  • Screw position: .275: from end 
  • Outside diameter: .670"
  • Overall length: 4.5" 
  • Chrome finish 
  • Secured with round knurled blackened steel knob 

    Prop 65WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov