Type AB point has a conical tip and fine spaced threads that are suitable for forming threads in thin metals between 0.015" and 0.050" thick and resin impregnated plywood

Steel is often used in applications where strength is the primary consideration, and the zinc plating resists corrosion and has a black reflective appearance

Flat head has an 82-degree cone shape for use in countersunk holes and a flat top that fits flush with the mated surface

Phillips drive has an x-shaped slot that accepts a Phillips driver and is designed to prevent over-tightening