REDLINE CBT™ CERAMIC BOND TECHNOLOGY SLIMCUT™ THIN CUT-OFF WHEELS EXCEPTIONAL LIFE & SUPER FAST CUTTING CONTAMINATION-FREE Pearl’s Ceramic Bonded Technology™ (CBT™) grain is a non-fused ceramic aluminum oxide that is extremely strong and durable. It is a very fine crystalline structure, which allows for micro-fracturing of the abrasive grain. This promotes constant generation of new cutting edges allowing for longer life and faster cutting throughout the entire life of the wheel. In addition, CBT™ grains perform exceptionally well on stainless steel.