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
18-8 stainless steel provides good corrosion resistance and strength, and the plain surface has no finish or coating
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