Description:Fit for CNC chucks or holders for drilling and milling machines.4 x CAT40 ER32 Collet Chuck HolderSpecifications Product Type: CAT40 ER32 Max Speed: 20000 RPM Accuracy: 0.00015" (0.004 mm) Processing Length: 2.76" (70 mm) Feature: Brand new collet chucks for ER type. The flexibility of the ER holder can clamp drills, reamers, end mills, taps and much more. This holder use the standard ER 16 collets. It is possible to use different types of nuts while using the same holder and collets. Standard, M type and bearing type, they offer stronger holding and reduce vibration of the tool. All chucks have passed hardness and anti-crack test. Low strength steel could lead crack and rust very soon, especially by the inside pocket area, accuracy will also drop only after a little while, so make sure avoid purchasing bad quality and unbalanced chucks.