The Haimer Power Collet Torque wrench is a German engineered, German made product that ensures proper clamping torque is applied to standard ER collet chucks. Its dual-handled configurations ensures all sides are evenly tightened, thereby ensuring the highest possible run out accuracy of the collet. The dial gauge is marked with ER holder sizes, instead of individual torque levels, to ensure proper torque is applied during tightening for any operator. The torque wrench works with ER 16/20/25/32 collet chucks, as well as Haimer's own high accuracy Power Collet Chuck. 48.600.00.AK includes case and 3 standard inserts for ER16,25 and 32 collets. Additional inserts are available and sold separately.