PACKING LIST: 30mm, 40mm and 50mm drills, SDS+ arbors, pilot drill and a 350mm SDS+ extension rod; This high-quality TCT concrete hole saw kit includes everything you need to get started. INCLUDED PARTS: This core drill kit comes with a locking screw and a pilot drill, which is very practical for stabilizing the drilling process and ensuring that the drill bit does not move during drilling. PREMIUM MATERIAL: This masonry drill kit is made of high-quality tungsten carbide tipped material, which offers high strength and excellent drilling performance for demanding, long-lasting drilling jobs. It is also durable enough to last a long time. PRECISION CUTTING: These tungsten carbide tipped drills are perfect for cutting clean holes in concrete, brick and lightweight aggregate blocks. WIDE APPLICATION: Suitable for brick walls, red brick, masonry walls, foam brick, hollow blocks, etc. It can be used to install air conditioners, such as air conditioners, kitchen hoods or washing machines. Note: Do not use on steel, tile or stone. Product Description: This core drill kit includes all the basic accessories needed for drilling into masonry, making it an ideal tool kit to get started with. With 3 types of premium TCT core drills and an extension rod with round shanks, this is a truly practical and valuable core drill kit that you should not miss.