Chrome vanadium 6-pt. sockets in a molded storage case. 9 standard SAE 1/2in. through 3/4in. and 9 standard metric sizes 10mm through 18mm. 5/8in. spark plug socket, 6in. extension bar and quick-release ratchet handle.Drive:3/8 in.Pieces : 21qty.Point Size: 6 qty.Handles :(qty.) Quick Release Ratchet (Item# 558064)qty.SAE Socket Size: (Standard) 1/4 (Item# 558102), 5/16 (Item# 558103), 3/8 (Item# 558104), 7/16 (Item# 558105), 1/2 (Item# 558106), 9/16 (Item# 558107), 5/8 (Item# 558108), 11/16 (Item# 558109), 3/4 (Item# 558110) in.Metric Socket Size: (Standard) 10 (Item# 558077), 11 (Item# 558078), 12 (Item# 558079), 13 (Item# 558080), 14 (Item# 558081), 15 (Item# 558082), 16 (Item# 558083), 17 (Item# 558084), 18 (558085) mm.Spark Plug Socket Size : 5/8 (Item# 558124) in.Extensions: (1) 6" Dual Position (Item# 558068)qty.Material Type: Chrome Vanadium Steel.Storage Type:Molded Storage Case.