Product name:Wall opener. Length of connecting rod:100mm-600mm. Hole opener size:30mm-160mm. Performance:High density, strong hardness, good toughness, strong bending strength. Material:The cutter head of the hole opener is welded with high quality alloy, mainly used for opening holes in brick and concrete buildings. Model Use (for reference). Diameter 30-1/2 (for water pipes and water heater pipes). Diameter 35 – 3/4 (for water pipes and water heater pipes). Diameter 40 – 1 pipe. Diameters 55 & 65 – 1P-2P Air Conditioning Piping and Bathroom Piping. Diameter 75 – 2-5P air-conditioning cabinet pipework – 5P air-conditioning cabinet pipework. Diameters 110-120 – Wall switch wall concealed holes for wall switch inner boxes. About the hole opener. (1) wall hole opener, also known as hollow electric hammer drill, using high-quality alloy welding, used for brick and concrete structure building hole, electric hammer special, can hit the brick wall and cement wall, can not hit the rebar, tiles and stone Oh! (2) If one side of the wall has tiles, you have to first use the tile opener to tile a hole, and then use the wall opener to punch holes, it is recommended that the tile opener than the wall opener larger than a specification! Electric hammer hole vibration is too large, the screws are easy to loosen the situation is most of them have, temporary manufacturers can not be solved, buyers can set a good position after the centre drill off to continue to punch holes, small hole opener 30 and 35 screws will be part of the hole opener will be high, in fact, small hole opener can be set a good place to take the centre drill off to continue to punch holes Oh. (1) Due to the lighting effect and shooting angle and other reasons, the product has a colour difference, please understand. (2) Due to manual measurement, there are errors in product size. (3) You can find more products with different materials, types, colours, sizes, quantities and shapes in our shop. (4) If you have a big demand, you can find us a discount!