The Grey Pneumatic 1213MSD is a 13 piece 3/8 inch drive semi deep metric impact socket set designed to provide improved access in tight spaces. Made from chrome molybdenum alloy steel with a black oxide finish, the sockets feature a six point surface drive design that grips fasteners securely and reduces rounding. The semi deep length and necked down profile increase clearance around bolts and components. The set includes metric sizes from 7 mm through 19 mm and comes in a blow molded storage case for organization and protection.