Mercer Abrasives 717147 60-Tooth Atb Carbide Wood Cutting, Ultra Fine Finish A Storm is Brewing. Lightning Strikes Again. Mercer Abrasives has added to the existing Black Lightning line with Silver Lightning and Blue Lightning. Silver Lightning is a collection of 27 wood cutting carbide blades for every construction application. These high quality blades cut fast, clean and accurately. Their laser cut noise reduction anti-vibration vents reduce noise and vibration, while stabilizing the blade and produces a smoother, cleaner cut and longer blade life. Our laser cut heat expansion slots allow the blade to expand due to heat build up while keeping the cut accurate and controlled. The laser cut arbor reduces vibration and wear and keeps rotation consistent. Silver Lightning Blades feature a laser cut thin kerf the produces a fast, clean and accurate cut. One 7-1/4" blade with both 5/8" and diamond cut-out arbors for cutting wood ATB Tooth configuration. Thin kerf for fast, clean and accurate cutting Fits all 7-1/4" circular saws. Max RPMs 10,000 Noise reduction anti-vibration vents reduce noise and vibration while stabilizing the blade producing a smoother, cleaner cut and longer blade life Heat expansion slots allow the blade to expand due to heat build up while keeping the cut accurate and controlled Smooth clean top finish No burning and swirl marks Clean edge cut No edge tear-outs No rough finishes