Kics Bull Lock & Nut Set – 12X1.5mm Black Closed End Acorn 19mm Hex 16+4pc Set #0651B-19. Includes sixteen standard lugs, four locking lugs and one adapter key. Lug nuts are 31mm tall. Conical Seat, 60 degree. Key adapter outer diameter 26mm. Made in Japan. Do not use impact gun on locking lug nuts.