Specification: Material: Alloy Outer Diameter Size: 16mm, 18mm, 20mm, 22mm, 25mm, 26mm, 28mm, 30mm, 35mm, 40mm, 45mm, 50mm, 53mm Chuck Size: 10mm Application: Can be used for bench drills and electric drill chucks with machine tools Product Description: [High Quality Material] The gears are made of YG8 tungsten carbide steel and the rigidity varies from the hole saw has a twist drill inside, sharp edge, high strength, high precision, smooth cutting, especially resistance to impact and resistance mill. [Intelligent Design] 64HRC to 65HRC. Three groups of edges, each blade in the cutting process is responsible for 1/3 of. Sharp gears and low-consumption anti-cutting edges make the product have a long service life. [13 Different Sizes] Outer Diameter Size: 16mm, 18mm, 20mm, 22mm, 25mm, 26mm, 28mm, 30mm, 35mm, 40mm, 45mm, 50mm, 53mm [Decorative Hole Drilling] Carbide teeth for fast cutting of clean round holes. Suitable for handheld electric drills, motorized drills and mobile ribbon-type magnetic drills. [Use for] Fast and accurate hole cutting in stainless steel, mild steel, iron, copper and brass. Can drill about 20 mm deep for wood and drill about 5 mm for stainless steel. the workload and inside each edge also has a sharp edge, also because of the edge. Note: This product is not easy to cut relatively thin metal material, can cut within 2-5mmStainless steel plate and metal plate 15mm Boring Saw Set Features: Each edge is part of the cutting work characteristics, so the hole is not easy to create the appearance of collapse. Drilling stainless steel plate, steel, castings, aluminum alloys, iron and other metal plates, chip evacuation, excellent performance, sharp edge, wear-resistant. Hole Saw Drill Bit Description: Three groups of edges, Each blade in the cutting process is responsible for 1/3 of the workload, and inside each edge also has a cutting edge, also because of the edge, each load on the properties of a part of the cutting work, making the hole drilling is not easy, to create the appearance of edge breakage.