
【PACKING LIST】 : 30mm, 40mm, 50mm drill bits, SDS+ arbors, pilot drills and 350mm SDS+ extension rod; This high quality TCT concrete hole saw set contains everything you need to get started. 【NECESSARY PARTS INCLUDED】: This core drill set comes with 1 locking screw and 1 pilot drill bit, it is quite practical to help stabilize the drilling process, ensure the tip of the drill bit will not move when you are drilling. 【PREMIUM QUALITY MATERIAL】This masonry cutter set is made of high quality tungsten carbide tipped material, high strength and excellent drilling performance for long term tough drilling work, also durable enough to last for a long time. 【PRECISE CUTTING】: These are tungsten carbide tipped drill bits that are great for cutting clean holes in concrete, brick and cinder block. 【WIDE USE】Suitable for brick walls, red bricks, masonry walls, foam bricks, hollow cores, etc. It can be used to install air conditioners, such as air conditioners, range hoods or washing machines.