Drills which have a hexagonal grip are putted on a normal clamping head or on a collet drill chuck. Hexagonal form allows to keep the drill in the chuck in proper alignment, so there is a better energy transfer.
Thread Size: 7/16"-14
Type: left-hand thread
Cutting material: HSS
A tap is a drill for creating an internal thread in metal, plastic or other solid materials. The tap only cuts the thread. The actual core hole must first be pre-drilled with an ordinary twist drill.