1、Pull back collet has strong clamping force, high rigidity and low noise, very convenient to use 2、The strength is relatively high after heat treatment and cold drawing hardening, come with a certain degree of flexibility and plasticity 3、Adopt fine workmanship, quenching processing bring sturdiness and durability, using inner hole grinding 4、Made of 65Mn material, possess high hardness greater than HRC48‑55°, come with 0.005 high accuracy 5、Half‑cone angle design of the spindle machine collet bring more clamping force, widely used in milling, drilling, tapping, engraving, CNC 1 x Collet Item Type: ColletMaterial: 65 MnAccuracy: 0.005Hardness: > HRC48-55°Carburizing Depth: > 0.8mmSurface Roughness: > 0.8MMDiameter: Approx. 5mm / 0.2inUses: Widely used in milling, drilling, tapping, engraving, CNC, half-cone angle design of the spindle machine collet bring more clamping force