The BF850 Series Diamond blades use Real Natural Diamonds and have a 12 mm Diamond rim for Extreme speed, extreme precision and for extreme long life. Can be used wet or dry and can be used in hand held or stationary machines. Ideal for use on:Building materialsConcrete productsGranite and Natural stone Technology Used:Safety: Marcrist diamond products comply with every known safety standard worldwide.Self Cooling: Titanium coated diamonds provide a self-cooling and self-sharpening cutting edge.Armoured Blade Core: Armoured centre for blade strength. PATENTED.Engineered Core: Precision Engineered core, hardened, ground, balanced and tensioned.Semi-Silent: Noise suppression for semi-silent operation. PATENTED.Lightening Fast: For Fast Cutting Speeds.