Wolfride Road Bike Mountain Bike Water Bottle Cages, Aluminum Alloy Bicycle Water Bottle Cage Holder Adjustable Style High grade 3 Teeth T-shape Groove Router Bits for Woodworking Solid Hardened Steel Bodies Router Bits, Anti-Kickback Design, C3 Micro-grain Tungsten Carbide Cutters, Build-up & Heat Resistant Coating, Totally enclosed & lubricated The Tongue and Groove Router Bits will cut perfectly fitted tongue and groove joints ideal for wood flooring, wainscot paneling and shaker style panel doors It can be used for hardwood, cork wood and composite board, not for alloy materials/ sand/ stone and other non wood materials