*KeyFeatures *Spring Steel Design: Elevate your machining with our high-performance CAT40 collet holder and ER spring collet chucks, offering exceptional balance and a long service life. Includes 6 x CAT40 SLN collet holders with sizes: 1/4", 3/8", 1/2", 5/8", 3/4", 1"; ER32 and ER16 dynamic balance collet holders have a prominent length of 2.76''; APU collet holder with an extension length of 13 mm and a 1"-2.06" FMB collet holder. *Precision Perfected: Our CAT40 spring collet chucks boast a 0.0006" / 15 μm TIR, ensuring maximum precision. They are hardened and ground to perfection, ensuring outstanding concentricity. The high-speed collet chucks are balanced to meet all industrial standards, providing stable performance, and are widely used in aerospace, automotive manufacturing, medical equipment, electronics, and various industries. *High-Quality Materials: Our CAT40 collet holder and ER spring collet chucks are built from sturdy 40Cr and 45# alloy steel respectively, hardened and precision-ground, making them suitable for high-speed milling of precision parts, high-strength grinding, and various machining scenarios. It also ensures the durability of the collet chucks and effectively addresses deformation issues during machining. *Versatile Collet Chuck Sizes: Our collet chuck set includes 10 x ER16 collet chucks in sizes: 1/32", 1/16", 3/32", 1/8", 3/16", 7/32", 1/4", 5/16", 11/32", 3/8", and 12 x ER32 collet chucks in sizes: 1/8", 3/16", 7/32", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4". The unique angled slots enhance rigidity, ensuring better overall balance of the collet holder assembly. Designed for use with any standard ER spring collet chuck, it's ideal for cooling tooling applications. *Extra Wrenches & Pull Stud: Our CAT40 collet set comes with 3 wrenches (ER32, ER16A, APU13) for extra tightening and easy release when needed. Additionally, it includes 10 Pull Studs. Perfect for CNC lathes/milling machines, drilling machines, and heavy-duty manual tools. ******************************************************************************************************* *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% ******************************************************************************************************* *Pakcage Content 6 x SLN Collet Holders 1 x FMB Collet Holder 1 x ER16/32 Collet Holder 1 x APU Collet Holder 12 x ER32 Collet Chucks 10 x ER16 Collet Chucks 1 x ER32 Wrench 1 x ER16A Wrench 1 x APU13 Wrench 10 x Pull Studs 1 x User Manual