High Quality: The concrete hole saw is welded with high quality carbide, with high hardness, sharp cutting edge, strong corrosion resistance, thick and durable. Chip Removal Design: The chip flutes are uniquely designed, with smoother chip removal, less resistance, faster speed and higher drilling efficiency. Application: It can be used for opening the hole of air conditioner, range hood or washing machine pipe, water pipe, etc. Applicable Punching Equipment: Mainly for punching brick walls, concrete walls, cement walls, rammed earth walls, foam bricks, clay brick walls and masonry walls, etc. Not suitable for tiles, glass, metal, steel bar, stone, etc. Note: 1.This hole saw with a center drill bit must be matched with a connecting rod adapter before it can be used on an electric impact drill. 2. The hole saw does not include the connecting rod, and the connecting rod needs to be purchased separately. Features: 100% brand new and high quality. Made of high quality metal material and with carbide tip. The welding openings are very strong, the inner and outer welding mouth smooth, precision engagement, appearance. High Quality: The wall-mounted hole saw is welded with high-quality hard alloy materials, with high hardness, stability and durability, sharp cutting edge and strong corrosion resistance. Scope of Application: Mainly used for opening holes in brick-concrete structures. Suitable for brick walls, adobe walls, concrete walls, cement walls, moss walls, red brick walls, clay bricks, etc. Not suitable for steel bars, tiles, glass, metal, stone, etc. Note: 1. The hole saw does not include the connecting rod. 2. The connecting rod is sold separately. 3. Hole saws should be used with connecting rods and are suitable for electric impact drill equipment. Specifications: Type: Concrete Hole Saw Drill Bits. Material: Carbide. Color: Silver gray. Threaded Interface: 22mm. Hole Saw Diameters: 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 120mm, 125mm, 150mm, 160mm. Applicable to: It is the perfect choice for plumbers, heating and ventilation engineers, electricians, kitchen designers and general builders. Widely used to install air conditioner, oil fume extractor and open sewer pipe hole, ect. Package Included: 1 x Concrete Hole Saw. 1 x Center drill. Please allow 1-2cm errors due to manual measurement. When opening the hole, take good protective measures to prevent debris from splashing and hurting your eyes. Features: 100% brand new and high quality. Made of high quality metal material and with carbide tip. The welding openings are very strong, the inner and outer welding mouth smooth, precision engagement, appearance. High Quality: The wall-mounted hole saw is welded with high-quality hard alloy materials, with high hardness, stability and durability, sharp cutting edge and strong corrosion resistance. Scope of Application: Mainly used for opening holes in brick-concrete structures. Suitable for brick walls, adobe walls, concrete walls, cement walls, moss walls, red brick walls, clay bricks, etc. Not suitable for steel bars, tiles, glass, metal, stone, etc. Note: 1. The hole saw does not include the connecting rod. 2. The connecting rod is sold separately. 3. Hole saws should be used with connecting rods and are suitable for electric impact drill equipment. Specifications: Type: Concrete Hole Saw Drill Bits. Material: Carbide. Color: Silver gray. Threaded Interface: 22mm. Hole Saw Diameters: 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 150mm, mm. Applicable to: It is the perfect choice for plumbers, heating and ventilation engineers, electricians, kitchen designers and general builders. Widely used to install air conditioner, oil fume extractor and open sewer pipe hole, ect.