Wheel types; type 1=flat wheel for cutting, type Depressed center wheel, Type 28=hat shaped for grinding and type 29=flap disc for grinding and finishing. Fine grain=long life=slower cutting and grinding. It features a jumbo blue zirconia construction with a high density depressed center, providing great flexibility and durability. This flap disc cuts fast and outlasts sanding discs 10 to 1, making it ideal for rough or fine finishing Cuts fast and outlast sanding discs 10 to 1., Great flexibility and ideal for rough or fine finishing., 4-1/2-inch (114., 3 mm) with 5/8-inch - 11 threaded arbor. The Forney 71921 4-1/2-inch type 29 Mounted High Density Blue Zirconia flap disc is for right angle grinders. Forney Industries Inc. 71921 - Flap Disc, High Density Jumbo Blue The product is 4.5" Flap disc - type 29 - 60 grit - high density depressed center - 5/8 11" Arbor. Blue zirconia flap discs for right angle grinders ZA60 with max 13, 500 RPM. Typical spec example a24r-bf: a=used for steel, 24=grit (coarse), medium to hard BOND. Claims for warranty must be made within 90 days of the date of purchase. Type 29 Angle Grinder Sanding Disc Forney 71921 Flap Disc, 4-1/2 In Dia, 5/8-11 Arbor, 60 Grit, Medium Forney 71921 Grinding Wheel This warranty does not cover any product that has been subject to misuse, neglect, negligence or accident, or that has been used in any way contrary to the purpose intended., The product is 4., 5 Flap disc - type 29 - 60 grit - high density depressed center - 5/8 11 Arbor , Easy to use
