Optimized for 1" drive impact wrenches and adapters. Ideal for heavy equipment maintenance and roadside service. Stamped and ink filled diameter markings. Dual hole design and groove for easier attachment. Comes in PACKOUT compact organizer. Meets ASME industry standards. Includes: 1" Drive 1-1/16" Thin Wall Extra Deep 6pt socket. 1" Drive 1-1/8" Thin Wall Extra Deep 6pt socket. 1" Drive 1-1/4" Thin Wall Extra Deep 6pt socket. 1" Drive 33mm Deep 6pt socket. 1" Drive 1-1/2" Deep 6pt socket. 1" Drive 13/16" 4pt socket. 1" Drive 1-3/16" 6pt socket.