Check the listing for details. 16mm HSS Reduced Shank Twist Drill Bits. Condition: New. Listed at 16.84 USD. Reduced Shank Drill BitsGeneral Information：[1]Versatile Uses: For use in a wide range of stainless steel, aluminum alloy, iron, copper, brass, wood, plastic, and other metal materials. Suitable for hand drills, bench drills, etc. Tri-flat on the shank of drills are constructed for tighter chucking maximizing security for precise holes.[2]High Speed Steel Tool: The twist drill bits are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. High cutting edge strength, fast cutting speed.[3]Reduced Shank: Reduced shank drill expands the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Sharp and spiral cutting edge provides neat and smooth cuts.