Description: 100% brand new and high quality. High occlusion, can perfectly, greatly decrease harm to screw. With weak magnetic on its head, convenient to use, easy to be install and handle. It is available when installed on and integrate with these tools, such as electric hammer drill, rechargeable drill, drill, etc. It can be switched into square connector, so that it can be used for installing sleeve, used as a good part for conversion Material: chrome-vanadium steel Specification: Quantity:1 Set (8Pcs) Adapter size: 1/4*1/4 50mm Long ---1/4'' shank can be converted to 6.35mm square head 3/8*1/4 50mm Long ---1/4'' shank can be converted to 9.53mm square head 1/2*1/4 50mm Long ---1/4' shank can be converted to 12.7mm square head 1/4*1/4 65mm Long ---1/4'' shank can be converted to 6.35mm square head 3/8*1/4 65mm Long ---1/4'' shank can be converted to 9.53mm square head 1/2*1/4 73mm Long ---1/4'' shank can be converted to 12.7mm square head 1/4*1/4 25mm Long ---1/4'' shank can be converted to 6.35mm square head 1/4*1/4 30mm Long ---1/4'' shank can be converted to 6.35mm square head Package Includes:(6 Pack) 8Pieces Socket Driver