8 Pc. 3/8" Drive Stubby Triple Square Impact Bit Socket Set Triple square impact bits designed for high torque applications typically found in cylinder head bolts and drive trains. Sunex Tools impact sockets meet or exceed ANSI specifications. Stubby design is ideal for work in tight spaces. Impact grade bits forged from high quality CR-MO Alloy Steel. Includes compact clip rail packaging. Guaranteed to Perform. Set includes:. M4 Triple Square (304XZN). M5 Triple Square (305XZN). M6 Triple Square (306XZN). M8 Triple Square (308XZN). M10 Triple Square (310XZN). M12 Triple Square (312XZN). M14 Triple Square (314XZN). M16 Triple Square (316XZN) 3640