Designed for the quick and easy tightening or removal of ER11 collet nuts, an essential accessory for CNC machines, routers, lathes and collet extensions. Perfectly sized for a secure, positive fit within M type castellated collet nuts. The shorter handle length allows for precise levels of adjustment, ensuring the collet nut is not overtightened. The hardened alloy steel wrench is finished in a durable, corrosion resistant finish and embossed for quick identification. ©