Powerful 7.2 Amp (800W) motor with 9,700 rpm for strength and durability It is equipped with a standard 5/8"-11 spindle and two sets of flange/lock nut sets (7/8" and 20mm arbors) in order to accommodate 4", 4-1/2" and 5" diameter blades Can be used wet or dry for versatility Use the grinder as a dry application in conjunction the Alpha's Ecoguard System to create a dust-free performance For wet applications, you can equip the grinder with the optional Alpha Universal Safety Guard Kit for with an Alpha Groove Cutter or with the Alpha Wet Blade Cutting Kit Katana Blade: Designed to cut through all materials - porcelain, granite, marble, engineered stone and ceramic glazed tile Can be attached to an Alpha Wet Stone Cutter or popular angle grinder In combination with Alpha's Ecocutter Dry Tile Cutting System it creates a dry cutting experience, dust-free Can be used wet to minimize dust and extend the long-lasting performance and life of the blade