Constructed of high-grade S2 steel bit and Chrome-Vanadium alloy steel socket, it can be used for a long time. This AIRTOON 3/8 inch drive long hex bit socket set includes 8-pc inch hex bits: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 3/8"; and 10-pc metric hex bit : 3mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm. This extra long allen hex bit socket set offer extra length for easily reaching into deep, narrow work areas. The socket will provide maximum torque to tighten multiple types of fasteners. Clear size markings on sockets for easy to read and won't wear off that make it simple to find the right size fast. It comes enclosed in a blow molded case that allows easy storage and keeping everything organized. All AIRTOON Tools meet or exceed ANSI & DIN performance standards. It comes with 1 year quality guarantee. This AIRTOON 3/8 inch drive long hex bit socket set is constructed of high-grade S2 steel bit and Chrome-Vanadium alloy steel socket, it can be used for a long time. This extra long allen hex bit socket set offer extra length for easily reaching into deep, narrow work areas. The socket will provide maximum torque to tighten multiple types of fasteners.