Features: This top quality TCT (tungsten carbide tipped) core drill set contains everything you need to get started. Includes 35mm, 40mm, 50mm, 65mm, 82mm and 110mm core drill bits, SDS+ arbors, pilot drills and a 300mm SDS+ extension shank. These are Tungsten Carbide Tipped Core Drills that are great for cutting clean holes in concrete, brick and block work. 35mm-45mm drills are used to drilling water pipe and heater pipe, 55mm-80mm drills are used to air conditioner pipe, and 110mm used for 4inch wall fan. Comes with 2 locking screws and 2 guide drills. Specifications: Condition: 100% Brand New and High Quality Material: Alloy Color: Silver Core Drills Diameter: 35mm, 40mm, 50mm, 65mm, 82mm, 110mm Weight: Approx. 4300g Package Included: 6 x Core Drill Bits 1 x 110mm Shank 1 x 350mm Shank 2 x Guide Drills 2 x Locking Screws