Forged from tough chrome vanadium steel, this set is built to last Designed with 3/8" fittings which makes them compatible with Park Tool torque wrenches SBS3 (PK-2690) set includes: 3, 4, 5, 6, 8, 10, 14, and 16mm hex bits, long reach 5, 6, 8, 10, 11, 12, and 15mm hex bits, long reach T20, T25, T30, T40, and T45 Torx bits, 8, 9, 10, 11, 12, 13, 14, 15, 17, 19mm and 1" sockets (The 1" socket fits various Park Tool Freewheel, Cassette Lockring, and Bottom Bracket tools), 24, 26, 27, 28, 30, 32mm flat sockets for suspension fork fittings (27mm socket has external taper for narrow access fittings) SKT6 (PK-2691) set includes: 24, 26, 27, 28, 30, and 32mm flat-faced sockets for suspension fork fittings SBS1.2 (PK-4809) set includes: 3, 4, 5, 6, and 8mmhex bits, long reach 5, 6, and 10mm hex bits, long reach T25, T30, T40 Torx bits, 8, 9, 10, 13, 14, 15mm, and 1" sockets Retailers are not permitted to sell on the Amazon.com marketplace unless authorized in writing by Park Tool