This package carries (a)-(f): (a) 1 Piece of V20 (3/4" / 20mm) for 20mm / 3/4 Inch high / thick granite marble concrete quartz glass countertop / vanit top edge bullnosing Diamond Brazed Router Bit to do Full shape bullnose. (b) 1 Piece of V25 (1" / 25mm) for 25mm / 1 Inch high / thick granite marble concrete quartz glass countertop / vanit top edge bullnosing Diamond Brazed Router Bit to do Full shape bullnose. (c) 1 Piece of V30 (1 1/4" / 30mm) for 30mm / 1 1/4 Inch high / thick granite marble concrete quartz glass countertop / vanit top edge bullnosing Diamond Brazed Router Bit to do Full shape bullnose. (d) 1 Piece of V40 (1 1/2" / 40mm) for 40mm / 1 1/2 Inch high / thick granite marble concrete quartz glass countertop / vanit top edge bullnosing Diamond Brazed Router Bit to do Full shape bullnose. (e) 1 Piece of V50 (2" / 50mm) for 50mm / 2 Inch high / thick granite marble concrete quartz glass countertop / vanit top edge bullnosing Diamond Brazed Router Bit to do Full 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. (f) One Lock Ring Nuts and wrench set (the pairs of lock ring nut is necessory to attach the router bit to your 5/8"-11 thread spindle grinder / polisher).