Cylinder-shaped corundum grinding bits for precision sharpening, deburring, and general-purpose grinding with Proxxon Micromot rotary tools. Made from high-quality base materials of consistent hardness. The cylinder profile delivers consistent flat contact along straight surfaces, edges, and shoulders — ideal for general deburring and surface grinding where a uniform contact area is needed. Specifications: Shape: cylinder Abrasive: corundum (aluminum oxide) Shank diameter: 2.35mm (3/32") or 3.0mm (7/64") — accurately dimensioned for highest concentricity Quantity: 3 pieces per pack Ideal for: Straight surface and edge grinding Sharpening and deburring Cast iron and unhardened steels Non-ferrous metals and hard metal alloys Welded joints, rivets, and rust removal Works Well With: Professional Rotary Tool IBS/E — primary compatible Micromot rotary tool Proxxon AC Adapter NG 5/E with Electronic Speed Control (No. 38704) — variable speed bench power for controlled grinding Proxxon AC Adapter NG 2/S (No. 38706) — basic bench power supply for Micromot tools Corundum Grinding Bits — Ball Shape, 3-Pack (No. 28782) — ball-shaped companion for concave surfaces and internal radii Corundum Grinding Bits — Wheel Shape, 3-Pack — wheel-shaped companion for flat surface and edge grinding Aluminum-Oxide Mounted Points — Cylinder Shape, 5-Pack (No. 28774) — larger cylinder grinding points for similar straight surface work Returns can only be accepted for unused product in its original packaging. In addition to the returned item/items, a copy of the original packing slip or invoice is required. If proper paperwork is missing, PROXXON Inc. will not issue a credit. For warranty claims please call 1-877-776-9966. Please see our return and refund policy here. California Residents Prop 65 Information WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.