Feature●Made of high quality material, high strength and hardness, strong structure, durable in use.●Suitable for lathes, drills, milling machines, drills, taps, drills, milling cutters.●High quality ER11 collet block for clamping the spindle motor shaft.●Spiral linear thread, more convenient tensioning, quick replacement, high clamping force.●Smooth surface, no scratches, stable performance.Description