Check the listing for details. 1" Ogee Bullnose Bit 1 3/8" travertine concrete zero tolerance drum core bit. Condition: New. Listed at 89.99 USD. FREE SHIP (United States). Remind: The router bit arbor is non threaded, inner hole diameter is 7/8"-5/8" (washer included). We also attached one set of lock ring nuts and wrench, to ensure all grinder or polisher with 5/8"-11 thread spindle can use this router bit.This package carries (a)-(c): (a) 1 Piece of 1 3/8" (35 mm diameter) Diamond Zero tolerance grinding drum wheel and core bit TWO IN ONE (5/8"-11 Thread). Save time save money. The height of working layer is 50 MM. This tools do the stone concrete travertine hole cutting and the inner hole polishing at the same time. (b) 1 Piece of F25 (1" / 25mm) for 25mm / 1 Inch high / thick granite marble concrete quartz glass countertop / vanity top edge bullnosing Diamond Brazed Router Bit to do Ogee shape bullnose. The inner hole of this router bit is 7/8" to 5/8". it works with grinder or polisher with 5/8"-11 Thread spindle. Important Remind: Please make sure that your grinder or polisher speed is below 5000 RPM when using with it. (c) One Lock Ring Nuts and wrench set (the pair of lock ring nut is necessory to attach the router bit to your 5/8"-11 thread spindle grinder / polisher).