Hex Adaptors are used for tightening of socket cap screws and bolts. These are available in standard length and extra length. These are formed from solid steel bars. Available in 1/4" (6.35 mm), 3/8" (9.5 mm), 1/2" (12.7 mm), 3/4" (19 mm) and 1" (25.4 mm) square drives to cover across flat sizes ranging from 3 mm to 36 mm and 1/8" to 1.1/8" sizes. Range of sizes are available in various square drives. We can also provide sockets for any non standard square drive size / nut size.