TEKTON 3/8-Inch Drive Socket Set, Inch/Metric, 6-Point, 5/16-Inch - 3/4-Inch, 8 mm - 19 mm, 45-Piece | 13101 Master set has every size from 5/16 to 3/4 inch and 8 to 19 mm in both shallow and deep lengths Includes universal joint and extra long 6-inch extension, tools not found in most other sets Finely geared 72-tooth ratchet needs only 5-degree working swing arc High-torque, 6-point sockets grip flat sides of fasteners, not corners, preventing round off All tools are made from premium quality chrome vanadium steel with a mirror chrome plated finish