Park Tool socket bit sets are precision-engineered tools designed specifically for bicycle maintenance and repair. Known for their durability and professional-grade quality, these sets are widely used by home mechanics, bike shops, and cycling enthusiasts who need reliable, repeatable performance when working on modern bicycles. Hex bits: 3, 4, 5, 6, and 8mm Long reach hex bits: 5, 6 and 10mm Long reach Torx -compatible bits: T25, T30 and T40 Sockets: 8, 9, 10, 13, 14, and 15mm 1" socket: fits many Park Tool freewheel, cassette lockring, and bottom bracket tools including FR-1.3, FR-5.2, and BBT-22 NOTE: Not designed for use with impact drivers or other power tools All Sockets and Bits are 3/8" drive Park Tool SBS Socket and Bit Sets Ratchets & Bits UPC: 763477009364