MulWark 5 Spring-Loaded Automatic Steel Center Hole Punch and 14PC Security Torx Bit Set Bundle

EASY AND HANDY: Mark a dimpled starting point in metal, wood, glass, leather or plastic surface, prevent drill bits and screws from wandering around with one-handed hammerless operation,PREMIUM GRADE: This is made of hardened Cr-V steel that holds up to high impact and provides wear resistance, rust proof and strength to prolong the tool’s life,REPEATABLE IMPACT: The orange cap is adjustable to give increased or decreased striking force, and enables to gain uniform dimple size at every setting,WELL-EQUIPPED BITS SIZE: 14 piece torx screwdriver set in the following size: tamper proof torx bits of T4, T5, T6, T7, T8, T9, T0, T5, T20, T25, T27, T30, T35, T40,EXPERIMENT TESTS: The star bits have experienced torsion and hardness test. The results of tests show that the maximum torsion force of bits are 180-200N and the hardness of bits are 57-59HRC. The high torsion and proper hardness avoid the bits break and wear