FL-21MM15 Apex 21mm Fast Lead Metric Standard Socket, 1/2” Square Drive from Apex Fastener Tools are designed for multiple spindle or standard power tools. The tapered opening of this Apex socket almost instantly provides total engagement with the nut upon engagement. This speeds productivity and extends tool life. Engagement is possible without starting and stopping the tool for each nut. These Apex impact sockets are identified with a FL- prefix.

FL-21MM15 Apex 21mm Fast Lead Metric Standard Socket, 1/2” Square Drive from Apex Fastener Tools formally Cooper Tools, have hex tolerances that are on average 48% tighter than DIN and 35% tighter than ANSI requirements. Apex impact sockets provide an exact, sure fit every time. Apex impact sockets provide the tightest tolerances for straightness and concentricity available.

High strength fasteners in the aviation industry or high performance automotive field often require the use of an impact wrench or impact driver to deliver the amount of torque required to tighten or loosen them. FL-21MM15 Apex 21mm Fast Lead Metric Standard Socket, 1/2” Square Drive are designed and manufactured for high impact use. Apex impact sockets are made from stronger alloy steel than the average impact socket.