This Proto J5239-55W T55 Tip, Socket Bit Torx 3/8 in Drive is the perfect tool for loosening and tightening screws. This 3/8 in drive socket bit has a T55 tip size and style. The bit also features an alloy steel construction, which makes it strong and durable. It has a 7/8 in insert length with 1 23/32 in overall length. With this Proto T55 Tip, Socket Bit Torx 3/8 in Drive you will be able to handle all your screw driving needs with ease.