SZ-10-13MM Apex Socket Head (Hex-Allen) Hex Insert Bit is one of the most common screw drives in not only the aviation industry, but the automotive repair, technology and heavy industry sectors. SZ-10-13MM Apex Socket Head (Hex-Allen) Hex Insert Bit also common in heavy industry environments.

The Apex brand has always stood for quality design and is constructed to last longer than cheaper alternatives. Each Apex bit is manufactured to the tightest tolerances in the industry, most are even tighter than licensing agreement requirements and all Apex bits meet the most stringent government and military specifications.