Performance ball raced hinges are made to the highest specification from solid drawn brass and brass pins to guarantee no rust and a long lasting finish. They are ideal for heavy high quality doors in domestic applications. Featuring 4 ball bearing raced knuckles to prevent knuckle wear and provide a lifetime of silent, smooth door operation. Fixings included. Size L x W mm: 76 x 50 Knuckle Dia. mm: 8.0 Hole Dia. mm: 5.2 Thickness mm: 2.50 Knuckle Type: Ball Bearing Corner Type : N/A Material: Solid Brass Finish: BronzeSize 76 x 50 - 2 Pieces Timco Performance Ball Race Hinges - Solid Brass - Bronze