Meichoon Hole Saw Set 50mm 40mm 30mm Electric Hollow Core Drill Bit Shank 350mm Concrete Cement Stone Wall Drilling Cutter for Air Conditioner Masonry Tile

Features:Made of high quality carbide tipped metal material, very durableSimple operation, easy to use and fast perforatedUsed for drilling walls, stones, bricks,or installation of air-conditioning etc.High-frequency welding technology, welding openings is very strong, smooth inside and outside welding mouthSpecification:Material: MetalCutting Diameters: 50mm, 40mm, 30mmConnecting Rod: 350mm50-65mm Wall Hole Saw is for 1P-2P air-conditioning pipes and bathroom pipes30mm Wall Hole Saw is for general water pipes and water heater pipes Package Includes:3 x core drills (30mm, 40mm, 50mm)1 x 350mmshank1x drill bit

• Durable Materials - Made of premium 40Cr steel and tungsten alloy, this hole saw bit kit provides years of service even under harsh service conditions
• High Quality - Made of a hard-tipped metal material with super robustness and durability, it can be used for many years in the harshest conditions without any loss of performance.
• Excellent design - high frequency welding technology, very strong welding joints, smooth inside and outside welding joints.
• Simple operation, easy to use,and fast perforated.
• Wide range of applications - This masonry hole opener kit can easily drill through the most common wall materials (brick, adobe, concrete, cement and stone) so that you can install AC pipes, water pipes, exhaust hoses, and more!