WORK offers a range of lug nuts to be use with WORK Wheels and many other brands of after market wheels. WORK lug nuts are standardized to use with any after market wheel with 60 degree conical taper seat (will not fit OEM seat wheels). High strength and quality, using lightweight aluminum in anodized finish. RS-R Type = Open-End / Aluminum / Extended Length / Security Key Included *** Uses 19mm socket for both lug nut and lock key adapter. Always check your vehicle owners manual for proper torque specification for safe vehicle operation. Lugnuts are sold in a pack of 20 (16 lug nuts and 4 lock nuts) + security key.