Application:
a, Aluminium Oxide, General purpose: a general purpose disc for fast grinding of steel, welds, metal finishing and sturctural fabrication.
b, Aluminium Oxide, Long life: a premium quality designed for long life. hight stock removal and cool cutting action on metal and weld.
c, Silicon carbide, General purpose: a disc for all type of non-ferrous work. designed to grind aluminium,brass, ceramic, stone, magnesium, gray iron, etc.
d, Zirconium, Extra long life: a top quality zirconium disc for high speed grinding and superior stock removal on all steels including stainless. The best performance disc for weld removal, extra long life.
e, Zirconium, Long life: a high quality zirconium general purpose disc for fast grinding of steel, metal and welds, long life, not availale in grit 16#.

Size: 4", 4.5", 5", 6", 7"
Grit size: 16#, 24#, 36#, 46#, 50#, 60#, 80#, 100#, 120#, 150#, 180#, 220#, 280#, 320#, 400#
RPM: 4":13,200, 4.5":12,500, 5":11,500, 6":10,000, 7":8,500

Technical specs:
1, Surface: consistant and clean  
2, Spec tolerance: thickness:0.8±0.02mm; bore size:dia.22±0.2mm
3, Cracking checking: without cracking between resin bond and fibre paper
4, Punching test: without lost abrasive powder after at least 5 times punching
5, Abrasiving test: strong anti-abrasive and without lost abrasive powder and fiber paper after the abrasiving test
6, Safety test: Max working 80m/s and keep rotating at 30 sec. without cracking.