3M 7000120220 Paper Sheet 346U 80 Grit 9 x 11 Inch Aluminum Oxide Sandpaper

The 3M Paper Sheet 346U is constructed of aluminum oxide and comes in a range of grades and sizes to accommodate many different projects. This 80 grit sheet features a D-weight paper backing that supports aggressive sanding, yet is flexible enough to be used on curved surfaces. Its cut-rate and durability make this an excellent choice for blending the joints of connecting pieces in wood- and metal-working.

Key Features:

• Tough aluminum oxide abrasive cuts fast and performs well on many surfaces
• Load resistant open-coat feature enables longer use before replacement
• Strong, D-weight paper backing supports aggressive sanding
• Sheets are conformable to various workpieces and usable by either hand or machine
• Standard 9 x 11 inch sheet size fits most hand sanders and sanding blocks

Aluminum oxide is a very hard mineral that maintains sharp points on the grains much longer than natural abrasives such as emery or garnet. The abrasive grains are adhered to the sandpaper with some space between them, known as open-coat construction, to minimize the buildup of dust on the surface of the paper. This design helps prevent loading when sanding softer materials, extending the usable life of each sheet.