Trend SNAP/CSDS/12TC Trend Snappy TC No 12 drill countersink comes with depth stopTC drill countersink with rotating stopTungsten Carbide tipped version of the popular Trend Snappy drill countersink with adjustable short series HSS drill and non marring depth stop.This tool can be used in abrasive materials such as laminated chipboard.The drills produce pilot holes only.Specification-D=1/2 inchD=12.7 mmD2=9/64 inchD2=3.6 mmShank Diameter=1/4 inch hexScrew size S/W=No.12 H/W=No10