Features 1、This top quality TCT (tungsten carbide tipped)core drill set contains everything you need to get started. 2、Includes 35mm, 40mm, 50mm, 65mm, 80mm and 110mm core drill bits, arbors, guide drills and a 300mm + extension shank. 3、These are Tungsten Carbide Tipped Core Drills that are great for cutting clean holes in concrete, brick and block work. 4、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. 5、Comes with 2 locking screws and 2 guide drills. Specification Features: This top quality TCT (tungsten carbide tipped)core drill set contains everything you need to get started. Includes 35mm, 40mm, 50mm, 65mm, 80mm and 110mm core drill bits, arbors, guide drills and a 300mm + 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, 80mm, 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 Note: This product is a circle handle model, the circle handle model is suitable for light electric hammers; the square shank model is suitable for heavy electric hammers. Please confirm whether your equipment meets the requirements before purchasing. Package List