The router bit and 2 cup wheel is 5/8-11 Thread. This package carries (a)-(b). (a) 2 Pieces of 4 / 100mm Diamond Ultra Wide Segment Turbo Row Grinding Cup Wheel for concrete stone. (b) 1 Piece of V40 (40mm / 1 1/2 Full Bullnose). Router Bit/Profile (5/8-11 Thread arbor).Please don't use with high speed grinder/polisher. With water feed hole, can be wet use. The item "1 1/2 Inch Diamond Full Bullnose router grinding cup wheel stone concrete repair" is in sale since Sunday, April 10, 2016. This item is in the category "Business & Industrial\Construction\Building Materials & Supplies\Marble, Tile, Stone". The seller is "tool4stone" and is located in Seattle, Washington. This item can be shipped worldwide.