40 Pack Flap Disc, 4-1/2-Inch Flap Sanding Disc, T29 Zirconia, And Wood. Product Details ?Premium Quality?: These flap discs are constructed with industrial grade premium zirconia abrasive.It lasts longer than standard aluminum oxide abrasives and is designed for a stronger, more economical grinding wheel that offers strength, durability, and the ability to with stand high temperatures and pressures. ?Fiberglass Backing Plate?: A safe and effective product made with durable Material. It?s fast polishing, and it has durable fiberglass backing and fine crystal size. The flap discs are made with a fiberglass backing plate that effectively absorbs vibrations without smear during usage, bringing more stable and efficient grinding. ?Fast Grinding?: These sanding discs 4-1/2'' for angle grinder boast a maximum speed of 13,300 RPM, providing fast and efficient grinding that significantly decreases your workload while reducing friction heat to protect the workpiece's surface and prolong the disc's service life. ?Professional Grinder Flap Disc?: Flap disc 4-1/2 inch with 40/60/80/120 Grit 4 different grits total 40 packs. This 40 Pack flap disc set includes 20 pieces of 40 grit, 10 pieces of 60 grit, 5 pieces of 80 grit and 5 pieces of 120 grit, great Choice for cutting various metals, perfectly meets all you need. ?Wide Application?: Flap Discs have great performance for light rust removal, deburring, weld grinding, blending and finishing on both contoured and flat surfaces .Better on metals, alloyed and unalloyed steels, composites, plastics, and wood .Please do not for concrete or stone grinding. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.