NC-EX-376-4-NY Apex 3/8” Square Drive No Mar Extension, Pin Lock features durable construction and a quality design that ensures a long service life. With Apex drive extensions you are assured of high quality and industrial strength.

NC-EX-376-4-NY Apex 3/8” Square Drive No Mar Extension, Pin Lock has hex tolerances that are on average 48% tighter than DIN and 35% tighter than ANSI requirements. With Apex Fastener Tools, the industry leader in drive extensions, you are assured of an exact, sure fit. All Apex drive extensions have the tightest tolerances for straightness and concentricity in the industry.

High strength fasteners in demanding situations, like those found in the automotive and aviation industries, often require the use of an impact wrench or impact driver to deliver the amount of torque required to tighten or loosen them.