Router Bit Centering Gauge Fits 1/4 & 1/2-Inch Router Collets

Are your dadoes & ornamental cuts sometimes a bit off? Slip this new pin-point precision gauge into your router collet (fits both 1/4" and 1/2"), and it will put every cut on target! With your router inverted, hold a square in place and rotate the gauge to check for run out or wobble.