With D90 diamantine grit ensures vibrations less operations and 50% longer life than standard drill bits, maintaining sharpness across ceramic, glass, and engineered stone surfaces Its M14 thread enables tool less attachment to most rotary tools, while the 45 # steel body withstands heavy duty use across multiple materials without deformation Ideal for renovation contractors and DIYer enthusiasts requiring reliabled tools for bathroom remodels, kitchen backsplash installations, and stone countertop projects Engineered with diamantine coated M14 threaded teeth, this hole cutter delivers rapid, cut through tiles, marble up to 50mm diameter, minimizing friction for professional results Perfect for wet / dry drilling in challenging environments, this opener exceling in tiles wall penetrations, glass panel modifications, processing with chip less edges, Manufacturer: JSGHGDF