Feature: 1. Made of good-quality steel material, durable with high strength, plasticity, heat resistance and toughness 2. Suitable for magnetic drills, radial drills, bench drills, lathes, vertical drills and drilling equipment, etc. 3. Annular cutter arbor come with simple operation, convenient use, and quick punching 4. Hollow boring bit have strong impact ability, high work efficiency, saving time and effort 5. Morse taper shank come with stable structure, excellent performance and long service life Specification: Item Type: Annular Cutter Arbor Model: MT3 Color: Silver Material: Steel Inner Diameter: Approx. 19.05mm / 0.8in Total Length: Approx. 175mm / 6.9in External Cooling Fixture: External cooling is required when drilling (external cooling nozzle or cola pot can be used for watering, equipment without a kettle is preferred) Application: Magnetic drill, radial drill, bench drill, lathe, vertical drill drilling equipment, etc. . Package List: 1 x Annular Cutter Arbor1 x Wrench Note: 1. Before starting to drill, make sure that the tool has been completely installed in place, and there is no looseness or unclamping situation.2. When using a magnetic drill to drill, it must be ensured that there is no iron filings under the magnetic block of the drill, the adsorption surface is flat, and the machine has no swing or incomplete adsorption.3. The whole process from the beginning of the drilling to the completion of the drilling should be kept cool enough without interruption. Brief cooling can easily cause tool chipping.4. At the beginning of drilling, the tool should be fed slowly and smoothly, and the feed speed can be increased after cutting into 1~2MM. When exiting the tool, slow down the feed speed appropriately, and keep the feed evenly during the middle cutting process.5. The reasonable linear speed of the cutting edge should be more than 40 meters per minute when drilling hard alloy steel plates, and the minimum should not be as low as 30 meters. At the same time, cemented carbide is a high‑hardness material. The blade should be prevented from bumping during storage and retrieving, and impact should be prevented during use.