Standard：3/8 inch, 7/16 inch, 1/2 inch, 9/16 inch, 5/8 inch, 11/16 inch, 3/4 inch, 7/8 inch adding convenient reach in tight space Daily Helper: Suited for 3/8 ” ratchet handle and extension bar. Connecting them with the crowfoot wrenches to tackle your daily issues, giving you more options when you are trying to get fasteners in tight spaces