Made to ANSI specifications
Chrome molybdenum steel, black oxide finish
Z-Drive sockets grip and turn flat surfaces of fasteners for reduced rounding
Socket center holes are punched through to add a bit more clearance for taller nuts and bolts.
Packaged in a blow molded storage case
Imperial Deep Includes 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″, 15/16″, 1″