Made of high-quality materials, durable. Suitable for: pneumatic air batch, electric drill, charging drill, electric screwdriver and so on. Magnets hold bits securely in place; accepts all 1/4inch hex-shank bits Extensions in lengths 50mm 60mm 100mm 150mm 300mm for superior access for hard-to-reach fasteners 1/4inch quick-change hex shanks fit all power drills, 1/4inch impact drivers and hand-held drivers Please note: the physical slightly color difference or difference, number or different, but does not affect the use, please do not mind, thank you! Size: 50mm 60mm 100mm 150mm 300mm Colour:Red Material:Chrome vanadium steel Package Contents: 5 x Extension Rod Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.