【LABOR SAVING HANDLE】The clamping nut wrench's handle is designed to hold the wrench tightly and saves effort during use.ER spanner is high work efficiency, long-term use is not easy to fatigue. 【HIGH STRENGTH】Clamping nut wrench is made of high quality material, high strength, and durable and easy to use. Collet chuck wrench with fine workmanship, provide good usage experience. 【USE OF ER WRENCH】To use of ER wrench is tighten it, hold the end of the wrench with your hand, and tighten it clockwise. The clamping nut wrench to loosen, rotate counterclockwise. 【REMOVING ER32UM】This collet chuck wrench is suitable for removing ER32NM type shank, extension rod nut. Collet wrench is also used for tightening and loosening collet chuck holder. 【ER WRENCH FEATURES】 ER40-UM collet wrench is simple to operation, low price, high labor intensity. The collet chuck wrench is anti-slip handle design, easy to operate and efficiency., Weight: 0.80027801106 pounds, Manufacturer: Oumefar