【Product Features】6-24 mm with no skipped sizesLarge, stamped markings that won't wear offGrips sides of fastener head, not corners, preventing round-off 【Description】12-point socket openings are an exact fit for double hex fasteners. They also offer mulitple positions for engaging square and hex fasteners, which is especially helpful when access is limited. The socket opening's radiused corners prevent round-off by gripping fasteners on their flat sides, and not their corners. Die-stamped markings are permanently impressed into the steel and can't wear off. They're designed with large, clear size numbers that are easy to read even in low light settings. The polished chrome plating protects against corrosion and wipes clean to a mirror finish. The .