RS Pro TORX Bit Set. RS Pro TORX Bit Set is a high-quality kit manufactured from chrome vanadium steel. Perfect choice for professionals or enthusiasts. High quality, hardened and tempered steel (S2) is durable and perfect for heavy-duty use. The Bit Set is supplied with a rail retaining bar which can be wall mounted or used within roller cabinet storage box. Bit length 50 mm / Drive size 3/8"