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. Corner Type Square Corrosion Rating 1 - Clean, dry & low humidity environments Description 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. Finish Polished Brass Hole Dia. mm 5.5 Knuckle Dia. mm 12.8 Knuckle Type Ball Bearing Length inch 4 Length mm 102 Material Solid Brass Max Door Weight kg 80 No. of CSK Screws 16 Open Width mm 76 Pin Material Brass Product Code 234751 Rec Screw Dia. mm 5.0 Rec Screw Gauge imp. 10 Screw Size imp. 10 x 1 Screw Size mm 5.0 x 30 Screws Required Per Pair 16 Size L x W mm 102 x 76 Thickness mm 3.00 Washer Steel Washer