Perfect for TMS lug stud conversions on street cars! Kics Project Racing Nuts feature super light-weight thin-wall construction using strong light-weight OEM quality materials. 4 of the lug nuts include a locking design, which can be torqued or removed using a keyed tool (included) that uses a standard 17mm hex key for easy installation. Designed to ensure best contact with oversized and taper seated. Each lug nut is coated in a black-chrome finish for ideal looks and resistance to corrosion and elements. Patened design, made in Japan. Includes 20 lug nuts, 5 of which are locking, and key.