1. Made of high quality 45 steel, its exceptionally strong, impact resistant and wear resistant. Not easy to breaks due to vibration. 2. The groove anti-slipping design can work for a long time, making the work feel comfortable, improving work efficiency and practicality. 3. Widely used in: family, outdoor, camping, farm. The anti-slipping design that works long hours makes the work feel comfortable. 4. Five different sizes: 32mm 38mm 42mm 45mm 50mm. and one hexagonal socket, The joint between the shank and the bit is tight, the structure is stable and not easy to fall off, safe for your use Specification Material: 45 Steel Color: Black Size: 32mm 38mm 42mm 45mm 50mm Package Includes: 1 x Drill Bit Set