Chrome Vanadium 6150 steel bits hardened to 52-53 HRC and tempered for extra strength. Features & Benefits: • Chrome Vanadium 6150 steel bits hardened to 52-53 HRC and tempered for extra strength. • Length: 30mm. • Model No. TX40S5 Specifications: Model No TX40S5 Brand: Premier Contents: 30mm TRX-Star; T40 (x5) Nett Weight: 0.08kg