This Four Hole Anti-theft Nut comes with four holes on the top and can only be used together with special made keys, thus it’s a high security nut for anti-theft. The four holes configuration can be set different for different customer, thus making it unique for each individual customer. It’s generally made of carbon steel and stainless steel. The sizes can be from M4 to M12 or according to customer requirements. It’s widely applied in the anti-theft for automotive car lighting, bicycle wheels, scooters ,tentes etc.