This product is suitable for: electric drill and electric grinder Suitable for sanding, cutting, drilling, polishing, engraving, etc. Can be used for jade carving stone carving wood carving. Note: Try to straighten the flexible shaft, don't twist it. Drill holes with attention, do not drill hard thick material, do not hard pressure hard Drill, or easy to break the flexible shaft core, Weight: 1.08467432904 pounds, Manufacturer: Kueohse