General description A pack of 100 security screws designed to prevent number plate theft. These screws feature a black flip top cap and provide a permanent, one-way fixing with a clutch head design. Technical specifications Size: No. 6 x 20mm Material: Stainless steel with a plastic moulded cap Cap colour: Black Other information Security screws with different colour caps available: 30633 (white), 30634 (yellow), 30636 (blue)