Apex Phillips® head screwdriver bits. The Phillips head screw drive is purposely designed to cam out when the screw stalls, preventing the fastener from damaging the work or the head. Apex quality begins with select raw materials. Only carefully chosen, high grade tool steel is used. Each tool is manufactured to the tightest tolerances in the industry, most are even tighter than licensing agreement requirements. Our bits meet the most stringent government and military specifications.