Features and Benefits: Lug Nut Wheel Sockets feature the Most Durable, Non-Marring Sleeve to protect rims during tire changes; ARMOR-GUARD Sleeve is made with premium, durable plastic towithstand regular wheel installation and removals; Lug Nut Sockets feature a non-marring plastic insert to protect lug nuts during use; Sleeves are color coded Gray for Metric sizes and Red for SAE sizes toensure easier socket selection; Sockets are Thin Walled for easy access in tight wheel assemblies; Sleeve holds securely during Lug Nut removals and lasts throughout thelife of the socket; Socket sizes are stamped & ink filled for the boldest, longest lasting markings; Non-slip hex geometry to prevent socket and fastener rounding; Sleeve can be removed to allow for lug nut access in tight wheelassemblies? Dual hole design and groove allows for easier attachment; Meets ASME Industry standards for thin-walled sockets; Optimized for use with 1/2 drive impact wrenches, drivers, ratchets, and adapters.