Monster Lug Lock sets are made of cold forged steel for a durable, yet light weight and thin wall construction. The compact size of Monster Lug nuts were designed to fit smaller diameter wheel holes found on today's high performance wheels on modern muscle cars, sport trucks, and SUV's. Constructed with an oversized 60-degree tapered seat that provides a better contact area. Each set of Monster Lug lock set includes (4) locks and (1) lock key adapter.