Trend Snappy dowel drill 10mm dia SNAP/SS/10MM FEATURES Hex shank carbon steel lip and spur (Brad point) dowel drill bit for drilling blind holes in wood.  The dowel drills are roll fluted to allow deep boring, as they improve resistance to clogging and help to eject chips faster. Dowel drills have centre points to aid control. The scribers give an excellent entry hole, ideal when boring for dowels. Hex shanks allow the drills to be used with quick-change chucks. They can allow be used in conventional chucks.  SPECIFICATION D1= 10 mm Overall length=131mm Shank Diameter=1/4 inch hex Shank Diameter: 1/4 hex Diameter Metric: 10