1. Bit is made of S2 alloy steel, hardness arrived at 58-62 HRC, reduce wear-outs.2. Chrome vanadium steel socket with high strength and large torque.3. The bit is pressed directly into the socket to make a permanent connection.4. Four detent grooves in the socket drive end provides firmly connected with the retaining ball of the drive tool.5. The beveled inner edge helps guide the socket to the drive tool.6. It has a radius corner design, causing the socket to grasp the sturdy wall of the fastener instead of the corners, thereby reducing the wear of the fastener.7. Use with ratchet to improve speed in tightening Torx drive fasteners. And the product has no insulation properties and is not suitable for electrical environments.Specification:Bit Size: T50Drive Size: 1/2-inchTotal Length: 140mm / 5.