Professional tool for commercial or occasional use. 13 Piece Tamper proof Torx Star Bit Sockets. Manufactured from Chrome Vanadium Steel for strength and durability Male Torx Star bits with a tamperproof hole / Security bit in the centre, so can be used as either. SET INCLUDES THE FOLLOWING 1/4" Drive (Length 37mm) T8 / T10 / T15 / T20 / T25 / T27 / T30 3/8" Drive (Length 48mm) T40 / T45 / T50 / T55 / T60 1/2" Drive (Length 55mm) T70 Set comes in durable snap shut case for easy storage and transportation. (D 35mm x L 210mm x W 110mm) Bits have a hole drilled in them to suit anti-tamper bolts.