TIGER ZIRC 4.5 INCH TYPE 27 DEPRESSED CENTER GRINDING WHEELS CUT FASTER AND LAST LONGER SO YOU GET PROVEN PRODUCTIVITY AT AN EXCEPTIONAL TOTAL COST. THE SELF-SHARPENING ZIRCONIA ALUMINA GRAINS RETAIN A HIGH CUT RATE THROUGHOUT THE LIFE OF THE WHEEL WHILE A HARD BOND DELIVERS LONG WHEEL LIFE FOR HEAVY DUTY APPLICATIONS. THE FLAT PROFILE OF THE WHEEL IN COMBINATION WITH DEPRESSED CENTER ALLOWS FOR A WIDE RANGE OF GRINDING ANGLES (0-45). THESE 1/4 INCH THICK GRINDING WHEELS ARE IDEAL FOR HEAVY STOCK REMOVAL, SCALE REMOVAL, WELD REMOVAL, WELD BLENDING, EDGE BEVELING, AND TORCH-CUT SOFTENING WITH A RIGHT ANGLE GRINDER. THE OPEN ARBOR OFFERS A COST-EFFECTIVE MOUNTING OPTION WHEN USING ADAPTING NUTS.THESE WHEELS ARE DESIGNED FOR HARDCORE METAL FABRICATION PROFESSIONALS WHO NEED A HIGH PERFORMANCE SOLUTION WHEN GRINDING STEEL, STRUCTURAL STEEL, AND IRON.