FIRST CHOICE Premium 2-Inch Assorted Zirconia Nylon Non-Woven Strip Wool Mold Grinder Triangular Discs (26 Count) and Alumina Hook and Loop Discs (240 Count) with Regular Grit (P36 -3000) grinding to meet your various polishing requirements. TWO TYPES OF HANDLE Weve found every connection method possible for your project. Roll-lock 1/4-inch (6.35 mm) round shanks work better with air tools; 1/4-inch hex shanks are better for power tools. Three Attachment Methods The air tool back plate features 1/8" and 1/4" shanks for use with any air or electric drill, die grinder and other rotary tools for maximum sanding control. You can even place the pad directly on your air tool, no handle required. Great for mold grinders This kit develops a special soft PU foam adapter pad that allows you to easily install hook and loop sandpaper on the black disc pad holder so you can do more with your mold grinder Things, time is money! 270 Pack 240 pieces of 2-inch H&L Sanding Discs (P80/120/180/240/320/400/600/800/1000/1500/2000/3000 20 pieces each), 15 Zirconia Roll Locking Discs (P36 /60/80/80 (5 pieces each), 9 non-woven discs, 1 tape piece, 1 wool disc, 1 air tool back plate with 1/8 inch and 1/4 Inch round/hexagonal handle, 1 soft foam layer cushion pad, 1 PU foam adapter pad.