Wall Drill Bit Hole Saw Set with SDS PLUS for Masonry Concrete Brick Stone 3.15in80mm *Exquisite craftsmanship:CNC turning, ultra-high temperature welding and grinding,high-quality materials *Wide range of applications:Red brick wall, cement wall, air conditioning hole, water pipe hole, soot hole, room decoration hole *Easy installation:Wear wrench for easy installationEasy to replace the different specifications of the shank *Complete specifications:30mm-160mm1.18In-6.3In)Series complete *Free exchange for 30 days