Made of metal material and with carbide tipped. Rounds alloy blade combinations, each blade to bear part of the workload, not prone to chipping off the edge High-frequency welding technology, welding openings is very strong, smooth inside and outside welding mouth, Precision engage, appearance. Treatment: Sand Blasting Size: Cutting Diameter: 100mm Total Length:72mm Shank: SDS PLUS 110mm Suitable For: brick, concrete walls, air conditioning openings Note: 1. If there are ceramic tiles on one side of the wall, first use a tile hole saw to punch a hole in the tile, and then use the wall hole saw to punch a hole. It is recommended that the tile hole saw is one size larger than the wall hole saw 2. Wall opener, also known as hollow electric hammer drill, is welded with alloy (YG11), and is used for opening holes in brick-concrete structures. Special electric hammer, can hit brick walls and cement walls, can not hit reinforced tiles and stones Colour:Silver Material:Metal Package Contents: 1 x Concrete Hole Saw 100mm 1 x SDS PLUS Connecting Rod 110mm 1 x Center Bit 1 x Wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.