With a ½" (12.7 mm) drive and four dual-ended sockets, this impact socket set provides coverage for common fastener sizes including ¾" (19 mm) x 13/16" (20.6 mm), 19 x 21 mm, 7/8" (22.2 mm) x 15/16" (23.8 mm), and 1" (2.5 cm) x 1-1/16" (27 mm). The components are organized in a plastic tray for convenient storage and transport.