1、Rc65 Hardness: The center punch spring loaded is specially designed for marking superhard materials and can be sharpened without losing rc65 hardness 2、Convenient and Practical: Hollow end roller pin punch sets help prevent damage from accidental slipping while actuating the pin 3、Safe to Use: The hammerless center punch provides excellent accuracy and control while being safe and easy to use 4、Accurate Control: Use the center punch spring loaded without the need for a hammer strike, ensuring accurate control 5、Scope of Application: For needle rollers up to 1/8in, suitable for watchmakers, engineers, carpenters, machinery, vehicles, woodwork 1 x Center Punch Spring Loaded Item Type: Center Punch Spring LoadedMaterial: High Carbon SteelHardness: 50-55 DegreesSpecifications: 1/8 in Needle Roller Punch with Hollow End, Which Can Prevent Accidental Slippage when Starting Up.For Needle Roller Machines Up to 1/8in