The most versatile ratchet set for confined areas available. 21 bits in a short version (20 mm). 2 different ratchet wrenches. The ratcheting mechanism allows for work on narrow space areas. T-bits: T15, T20, T25, T27, T30, T40, T45, T50, T55 Triple square: M4, M5, M6, M7, M8, M10 Hex: M4, M5, M6, M7, M8, M10 Adapter: 1/4′′ & 3/8.”