17MM STRUT CHANNEL DEEP IMPACT SOCKET 1/2" INCH DRIVE UNISTRUT TYPE SLOTTED. A restricted access socket for strut channel fixings. Specially designed socket for use with Unistrut ® type channel. 1/2" drive. Deep 72mm socket to accommodate stud length. Manufactured from hardened Chrome Molybdenum steel (Cr-Mo) for increased longevity and durability. Black phosphate finish to help resist corrosion. This socket is designed for use with Unistrut type channel and has a deep 72mm length to accommodate stud length. Made from CR-MO for strength and phosphate finish for protection.