Sunex 3640 3/8-Inch Drive Stubby Triple Square Impact Bit Socket Set, 8-Piece Stubby design is ideal for work in tight spaces Includes compact clip rail packaging Stubby design is ideal for work in tight spaces Forged from high quality CR-MO alloy steel Sizes: M4 (304XZN) M5 (305XZN) M6 (306XZN) M8 (308XZN) M10 (310XZN) M12 (312XZN) M14 (314XZN) M16 (316XZN)