Made of high quality 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. Surface 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 high-quality 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.