BLAC-KUT® Zirconia Type 27 Flap Discs feature a high-quality, high-density construction. Each disc measures 4-1/2 inches in diameter and has a 7/8-inch arbor. These flat-faced discs feature larger flaps and overlapping layers of coated adhesives. Choose your desired grit below. BLAC-KUT® Zirconia High-Density Flap Discs are ideal for numerous tasks. Use them to sharpen mower blades, spades, shovels, and more. These discs work with ferrous, non-ferrous, stainless, and exotic alloys. Type 27 flat flap discs are great for tasks requiring finesse. This makes them excellent for flat grinding and blending. BLAC-KUT® Flap Discs combine effective material removal with an extended product life. Their overlapping layers of coated abrasives expose new cutting surfaces as they war. This process makes them a more cost-efficient option than rigid grinding wheels! Click HERE for our selection of Type 29 Angled Discs.