General description VEVOR CAT40 Collet Holder ER 16/32 Collet Set includes a comprehensive collection of 35 pieces designed for high durability and precision in machining projects. Crafted from alloy steel, this set features various collet holders and chucks, ensuring versatility for different applications. Technical specifications Item Model Number: CAT4035 Quantity: 35 pieces Type: CAT40 CAT40-SLN Collet Holder TIR: 0.0004 in/10 μm CAT40-FMB Collet Holder TIR: 0.0002 in/5 μm CAT40-APU Collet Holder TIR: 0.005 in/130 μm CAT40-ER Collet Holder TIR: 0.0002 in/5 μm ER Collet Chuck TIR: 0.0006 in/15 μm Dynamic Balance: G2.5/25000RPM Collet Holder Hardness: HRC48-52 Material: 40Cr & 45# Alloy Steel Net Weight: 41 lbs/18.6 kg ±3% Compatibility and accessories 6 x SLN Collet Holders (sizes: 1/4", 3/8", 1/2", 5/8", 3/4", 1") 1 x FMB Collet Holder 1 x ER16/32 Collet Holder 1 x APU Collet Holder 12 x ER32 Collet Chucks (sizes: 1/8", 3/16", 7/32", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8",