Wrenches and Sockets -Socket Extension Bar Set Highlights Generic Brand Socket Extension Bar Set Description: 100% brand new and high quality; The stainless steel locking ball ensures a secure fit. The Snap-On Plugs Tightly & Will not Slip Off; 1/4-inch Hex Shank prevents stripping during high speed drilling operation; Heat Treated and Heat Treated Chrome Vanadium Base Steel for Normal and Impact Duty - Sandblasted Finish; Converts all electrical drills into Socket drivers; specification: Material: Chrome vanadium steel cr-v Color: as shown in display pictures Size for each extension bar Socket: The shank 1/4""x1/4"x65mm(length)-1/4" "can be converted to 6.35mm square Rod 3/8""x1/4""x65mm (length) -1/4""can be converted to 9.53mm square Rod 1/2""x1/4""x73mm (length)-1/4"" can be converted to 12.7mm square Package includes: 1 set of 3 pcs Socket Extension Bars