Item Type: Collet Chuck holder Material: 20CrMrTi steel Purpose: CNC lathe tapping Hardness: HRC48-55 Surface: >0.08mm Adapter Chuck: ER25 Applicable Taps: M2-M22 Front Float: Approx. 5mm / 0.2in Rear Float: Approx. 6mm / 0.24in Package List 1 x Collet Chuck holder This product is made of steel, please do not place the product in an environment that is too corrosive, humid and high temperature 1Floating and telescoping, effectively protecting the tap, the front can float 5mm, and the rear can float 6mm 2Made after quenching and hardening, bring high concentricity and good processing effect 3The body of the knife handle is made of 20CrMrTi steel, fully carburized and heat treated, and the inner and outer diameters are ground to enhance wear resistance and stable performance 4The required tapping quality can be achieved with ordinary chuck, suitable for all kinds of machine taps 5Collet chuck holder have stable structure, excellent performance and long service life