Features 【Specification】Material: 65Mn spring steel; Model: ER11; Range: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 1/8" ,1/4"; Height: 18mm / 0.7"; OD: 10mm / 0.39" 【Sufficient quantity】There are total 15 collets of various sizes in on set which can basic meet your need 【Easy to distinguish】Each collet is well packed in separate protective container with label, moreover, each collect is mark with size, so it’s easy to distinguish them 【Premium material】The product is made of 65Mn spring steel, quenched and hardened, internally and externally finely ground, with high precision,high elasticity, tight clamping and stable cutting 【Wide application】This spring collet set is widely used in CNC, milling machines, engraving machines, machining centers and other equipment. It is usually used for milling, boring, drilling, wire tapping and other operations Description: These spring collets are made of high quality 65Mn spring steel for CNC milling lathe tool and work-holding engraving machine. There are total 15 collets of various sizes in on set which can basic meet your need. Each collet is well packed in separate protective container with label so you can easily distinguish them. Collet must be placed into collet chuck nut before inserting into collet chuck. Specifications : Material: 65Mn spring steel Model: ER11 Range: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 1/8" ,1/4" Height: 18mm / 0.7" OD: 10mm / 0.39" Run-Out Tolerance: <0.008mm Weight: 127g(approx.) Package Includes : 1 Set(15pcs) x Collets Note: 1. Please allow 1-2mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List