Description:Strong impact resistance and anti-dropping make it very reliable and practical. Simple and convenient operation will not waste your time and energy.The characteristics of wear resistance and rust resistance make it can be used for a long time. Different specifications make it possible to meet different work requirements.Made of chrome vanadium steel material, it is very durable to use.There are eight specifications (50mm 1/4 Square Head, 50mm 3/8 Square Head, 50mm 1/2 Square Head, 65mm 1/4 Square Head, 65mm 3/8 Square Head, 73mm 1/2 Square Head, 25mm 1/4 Square Head, 30mm 1/4 Square Head) in this set.It is suitable for a screwdriver handle or electric screwdriver tool (hexagonal hole or three-jaw chuck) drive sleeve to use.Item Name: Socket JointMaterial: Chrome Vanadium SteelColor: Black, GreyConversion Type: Hexagon to Square HeadFeatures: Anti-drop, Simple Operation, Wear-resistantSpecification:50mm 1/4 Square Head - 1/4" shank can be converted to 6.35mm square head50mm 3/8 Square Head - 1/4" shank can be converted to 9.53mm square head50mm 1/2 Square Head - 1/4" shank can be converted to 12.7mm square head65mm 1/4 Square Head - 1/4" shank can be converted to 6.35mm square head65mm 3/8 Square Head - 1/4" shank can be converted to 9.53mm square head73mm 1/2 Square Head - 1/4" shank can be converted to 12.7mm square head25mm 1/4 Square Head - 1/4" shank can be converted to 6.35mm square head30mm 1/4 Square Head - 1/4" shank can be converted to 6.35mm square headSize Details: Hexagonal Shank: 0.635/0.25" (Approx.)Square Head Shank:0.635/0.25" (Approx.)1cm/0.39" (Approx.)1.25cm/0.49" (Approx.)Length:2.5cm/0.98" (Approx.)3cm/1.18" (Approx.)5cm/1.97" (Approx.)6.5cm/2.56" (Approx.)7.3cm/2.89" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:8 x Socket Joints