4-1/2" Polifan-Strong Flap Disc - Conical (PFC " Type 29), Special Line SGP Z-Strong, 36 Grit, 5/8"-11 Thread, Extra Coarse Grade, Zirconia Alumina Z, 13,300 Max RPM, Suitable For Steel

The patented POLIFAN-STRONG construction opens up a completely new dimension in grinding work on steel.Superb Features Offer Exceptional Performance Benefits: Fastest possible stock removal rates. Extraordinary stability previously only found in reinforced grinding wheels. Extended flap length allows for continued aggressive grinding up to the last grain. Extremely long tool life. Highly cost-effective due to reductions in tool changes and grinding times. Designed for use on high-performance power tools.Recommendation for Use: Coarse grinding of steel - weld removal, surface grinding.