
This set includes 30mm, 40mm, 50mm core drill bits, SDS+ chucks, guide drills and a 350mm SDS+ extension shank. Made of hardened metal, high quality tungsten carbide tip, long service life. Suitable for brick walls, red bricks, masonry walls, foam bricks, hollow core drills, etc. It can be used to install air conditioners such as air conditioners, extractor hoods or washing machines. The drill teeth are sharp, the vibration is small during the opening process, and the operation is stable. Rounds alloy blade combinations, with each blade having to bear part of the workload, not likely to tear. Professionally designed drain holes ensure smooth chip removal when opening. Comes complete with core drill, pilot drill and SDS arbor, easy and quick to drill. Low pressure is essential to extend the life of the cutting tips and achieve a straight cut. they cannot be used for concrete, load-bearing walls, walls with steel bars.