The Muteki Lug nuts are a small compact size and shape. 20mm diameter to fit most tuner wheels with small lug holes. Each lug nut weighs 36grams which is lighter than your typical lug nut weight of 60grams. Made from cold-forged 1008 steel, the Muteki lug nuts are strong and lightweight they come in a set of 20 splined units and 1 key.