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. Bearing Type Brass Ball Bearing Corner Type Square Corrosion Rating 4 - Urban & industrial areas with a moderate salt atmosphere 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 Satin Chrome Hole Dia. mm 5.2 Knuckle Dia. mm 8.0 Knuckle Type Ball Bearing Length inch 3 Length mm 76 Material Solid Brass Max Door Weight kg 40 No. of CSK Screws 12 Open Width mm 50 Pin Material Brass Product Code 234444 Rec Screw Dia. mm 4.0 Rec Screw Gauge imp. 8 Screw Size imp. 8 x 1 Screw Size mm 4.0 x 25 Screws Required Per Pair 12 Size L x W mm 76 x 50 Thickness mm 2.50