C12-ER8M - 100L 12 mm shank CNC milling extension collet holder - Product name: collet; material: steel - model: C12-ER8M - 100L; shaft diameter: 12 mm - chuck head type: ER8M; shaft length: 100 mm - concentricity tolerance: 0.01 mm; colour: silver - weight: 1. 111g11gContents: 1 x collet chuck