
Quick Change Hex Shank: 12mm, 16mm and 19mm, all with a quick change hex shank for easy quick change with a 1/4" quick clamping system Heat Treatment: General high frequency quenching, increase hardness Function: Ideal for boring 90 degree holes in wood and soft metals in preparation for countersunk screws and fasteners. Use: Quickly and easily cuts into soft metal, wood, rubber, plastic and other machinable materials Application: Suitable for carpentry, locksmiths, automotive and metalworking.