Big Horn 19081 3 by 1/2 Inch Long Router Bit Centering Gauge

Big Horn 19081 Router Bit Centering Gauge. Fits both 1/2" and 1/4" router shanks. 3" long by 1/2". Use Big Horn's router bit centering gauge to precisely place your cuts and dadoes. Slip this pin-point precision gauge into your router collet (fits both 1/4-Inch and 1/2-Inch) and every cut will be on target! With your router inverted, hold a square in place and rotate the gauge to check for run out or wobble. 3-Inches long by 1/2-Inch diameter.