RTC Diamond Flap Discs are high-performance, diamond abrasive flap wheels engineered specifically for tile edge shaping, beveling, and refining cut edges on porcelain, ceramic, and natural stone tile. Designed to mount directly onto a standard 4-1/2" angle grinder, each disc features a 7/8" arbor hole and is optimized for dry-use only—eliminating the need for water feed systems while still maintaining a cool, smooth grind.

Unlike traditional diamond cup wheels that can gouge surfaces or cause excessive vibration, RTC’s layered diamond flap design delivers gradual contact with the tile, resulting in cleaner, more controlled material removal and less risk of edge blowout. Whether you're rough-shaping a mitered corner, smoothing exposed tile edges for a finished look, or prepping for polishing, these discs allow for faster, more precise work with better results.

Each flap disc is available in three grit options—60 grit, 120 grit, and 200 grit—allowing installers to choose the right level of abrasiveness for the job. Use 60 grit for aggressive shaping and removing larger amounts of material on dense tiles like rectified porcelain or stone. 120 grit is ideal for general edge shaping and light smoothing. 200 grit delivers a finer finish that preps edges for polishing or caulking, perfect for clean visual lines on shower niches, benches, and exposed transitions.

These diamond flap discs are especially valuable on jobsites where time, mobility, and finish quality are key. Since they’re designed for dry grinding, they can be used with cordless grinders in tight spaces or on vertical surfaces where water use isn't practical. The flap construction also helps prevent heat buildup and improves tool control—critical for avoiding chipped or burnt edges when working on expensive tile or custom profiles.

Whether you're a tile setter finishing a mitered edge on a porcelain plank or a fabricator smoothing the face of a niche return, the RTC Diamond Flap Disc gives you the professional-level finish and control you need to elevate your work and impress your clients.