These cranked hinges are manufactured from high quality extruded brass and brass pins to guarantee a rust free long lasting finish. They are ideal for high quality rebated casement door and window projects. The ball bearing raced knuckles prevent knuckle wear and will provide a lifetime of silent and smooth operation. fixings included. Size L x W mm: 64 x 55 Knuckle Dia. mm: 8.0 Hole Dia. mm: 5.1 Thickness mm: 2.50 Knuckle Type: Ball Bearing Corner Type : N/A Material: Solid Brass Finish: Polished ChromeSize 64 x 55 - 2 Pieces Timco Cranked Ball Race Hinges - Solid Brass - Polished Chrome in Silver