Husky HPR30PC 30-Piece 3/8 Inch Drive Palm Ratchet Set with SAE and Metric Units COMPACT RATCHET allows you to reach areas in your car or home where normal ratchets would be too bulky SAE MEASUREMENTS: 1/4, 5/16, 3/8, 7/16, 1/2, 9/16 inches METRIC MEASUREMENTS: 8, 10, 12, 13, 14, 15 mm DRIVE EXTENSION BAR gives you an extra three inches of reach for even tighter areas 15 SCREWDRIVER BITS: Phillips Head (#1, #2, #3), Slotted (3, 4, 5.5 mm) Hex (5/32, 3/16, 7/32, 1/4 inch), TORX (T20, T25, T27, T30, T40)