IVY Classic 42380 4-Inch Turbo Backing Pad with M10 x 1.25-Millimeter Thread Locking Nut， 1/Card<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>For using 4-inch resin fiber discs on 4-inch angle grinders with M10 x 1.25-millimeter threaded spindles， Flex-Abrasive (Registered Trademark)</li><li>Raised spiral ribs and vents form air-flow channels which cool the discs and extend operating life</li><li>Metal reinforcing ring is connected to backing pad with three pins to strengthen construction</li><li>Includes M10 x 1.25mm Locking Nut</li><li>Pad Diameter: 4-inch， Locking Nut Arbor: M10 x 1.25mm， Max RPM: 15000</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41HSFQRj9eL.jpg" noproxy>