Mibro Conical Grinding Stone – ⅞ x 2 ¼ inches, ¼” shank – 6 pack. Part number 753291TS. Mibro’s mounted mini grinding stones are made with aluminum oxide abrasives and can be used for shaping metal, masonry, glass and tile. Use in power drills, flexible shafts and small rotary grinders. Do not exceed maximum of 34,000 RPM PLEASE EMAIL PRIOR TO PURCHASE WITH ANY QUESTIONS THAT YOU MAY HAVE. ALSO PLEASE VIEW AND ENLARGE ALL PHOTOGRAPHS AS THEY SERVE AS PART OF THE DESCRIPTION. I DO MY BEST TO DESCRIBE MY ITEMS AND THEIR CONDITION, BUT AS THEY SAY “PICTURES SPEAK 1000 WORDS” AND CAN DO A BETTER JOB THAN ME IN TRULY ALLOWING YOU TO SEE WHAT YOU ARE GETTING. I WANT YOU TO BE 100% CONFIDENT IN YOUR PURCHASE EVEN BEFORE YOU BUY!!