The RYOBI 156 PC. Mechanics Set has 1/4" and 3/8" drive 90 tooth ratchets, providing a 4° arc swing for 20% more efficiency in tight spaces. The large size markings allow for quick and easy identification, saving time on the project. 6 point sockets provide maximum torque without rounding fasteners. The quick release ratchet allows for efficient socket changes and the chrome finish resists corrosion. Stay organized with the LINK wall storage compatible case. The 156 PC. Mechanics Set is backed by the RYOBI limited lifetime warranty and includes (1) Case, (1) 1/4" Ratchet, (1) 3/8" Ratchet, (1) 1/4" Driver Bit Driver, (1) 1/4" Drive 3" Extension, (1) 3/8" Drive 3" Extension, (1) 1/4" Drive Bit Adaptor, (1) 3/8" Drive to 1/4" Adaptor, (35) 1/4" Drive Sockets, (37) 3/8" Drive Sockets, (43) 1" Insert Bits, (18) Nut Driver Bits and (16) Hex Keys.