Description: _x000D_ These spring collets are made of high quality 65Mn spring steel for CNC milling lathe tool and work-holding engraving machine. There are total 10 collets of various sizes in on set which can basic meet your need. Collet must be placed into collet chuck nut before inserting into collet chuck. _x000D_ _x000D_ _x000D_ Features: _x000D_ Made from high quality 65Mn spring steel, they are stable in performance. _x000D_ Fine workmanship, good elasticity, high precision and run-out tolerance is 0.03mm._x000D_ _x000D_ Collet must be placed into collet chuck nut before inserting into collet chuck. _x000D_ Each collet is marked clearly so you can easily distinguish them. _x000D_ Great collet for CNC milling lathe tool and work-holding engraving machine._x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: 65Mn spring steel _x000D_ Model: ER20_x000D_ _x000D_ Range: 3mm, 1/8", 4mm, 5mm, 6mm, 1/4", 8mm, 10mm, 12mm, 1/2"_x000D_ Height: 30mm_x000D_ OD: 15mm _x000D_ Run-Out Tolerance: 0.03mm _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 10 x Collets