Feature:1. Made of full good-quality carborundum, finely polished and exquisitely carved, bring hard texture2. The handle is made of high-hardness alloy material, which is more wear-resistant and durable3. This mixing set contain a variety of specifications, which are applicable to meet the needs of use4. Suitable for pneumatic grinder, electric grinder, crane grinder, etc., very practical5. Used for mold processing and repair, glass grinding, flash, burr, weld of cast and forged weldments, inner hole of various mechanical parts, etc.Specification:Item Type: Carborundum Drill BitMaterial: Carborundum, alloyShank Diameter: Approx. 2.35mm / 0.09in, 3mm / 0.12inProduct Length: Approx. 45mm / 1.8inApplicable Machine: Pneumatic grinder, electric grinder, hanging grinder, etc. that can hold 2.35mm/3.0mm shank diameter Purpose: Mold processing and repair, glass polishing, flash, burr, weld of cast and forged weldments, inner hole of various mechanical parts, etc. Package List:30 x Carborundum Drill Bit1 x Storage Box