This pack carries (a)-(d): (a) 1 piece of E25 (25mm, 1 Inch) Diamond Brazed Router Bit Profiler to do bevel / 45 degree bullnose on marble granite concrete travertine. Remind: This router bit arbor is 5/8"-11 Thread. NOT M14 Thread. (b) 1 Piece of 4" Velcro Backer / Velcro Pad Holder (5/8"-11 Thread arbor). Remind: Velcro Backers max capacity is 5000 RPM. Please do not use it with high speed grinder / polisher. (c) 1 piece of 4 Inch Professional Final Glaze Buffing Pad for concrete granite stone (it brings them mirror like polished result). (d) 9 Pieces of 4 inch Premium Grade Diamond DRY Polishing Pad for granite concrete stone marble: 2 X Grit 50 100, 1 X Grit 200 400 800 1500 3000.