50pc 1/8'' Shank Diamond Coated Rotary Burrs Small Head Style Fits Dremel Rotary Tools 50 pieces kit, diamond coated rotary burrs, small head style 50 pieces diamond coated rotary burr box set; PVC box included 1/8" diameter round shank; Medium Grit: Grit size 120 Various shapes included, such as spheres, cylinders, bullets, needles etc. 1/8" (3mm) shank for electric rotary tools, drills, high speed die grinders and flex shafts;