Features: _x005F_x000D_ This top quality TCT (tungsten carbide tipped)core drill set contains everything you need to get started. _x005F_x000D_ Includes 35mm, 40mm, 50mm, 65mm, 80mm and 110mm core drill bits, 4-pits square arbors, drills and a 300mm 4-pits square extension shank. _x005F_x000D_ These are Tungsten Carbide Tipped Core Drills that are great for cutting clean holes in concrete, brick and block work. _x005F_x000D_ 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. _x005F_x000D_ Comes with 2 locking screws and 2 pilot drills._x005F_x000D_ _x005F_x000D_ _x005F_x000D_ _x005F_x000D_ Specification: _x005F_x000D_ Condition: Brand New and High Quality _x005F_x000D_ Material: Alloy _x005F_x000D_ Color: Silver _x005F_x000D_ Core Drills Diameter: 35mm, 40mm, 50mm, 65mm, 80mm, 110mm _x005F_x000D_ Weight: Approx.4300g/151.7oz _x005F_x000D_ _x005F_x000D_ _x005F_x000D_ Package list: _x005F_x000D_ 6 x Core Drill Bits_x005F_x000D_ _x005F_x000D_ 1 x 110mm Shank_x005F_x000D_ _x005F_x000D_ 1 x 350mm Shank_x005F_x000D_ _x005F_x000D_ 2 x Pilot Drills _x005F_x000D_ 2 x Locking Screws_x005F_x000D_ _x005F_x000D_ _x005F_x000D_ _x005F_x000D_ Note: _x005F_x000D_ Square handle (SDS) is suitable for heavy electric hammer; Round handle (PLUS) suitable for light electric hammer.