Size: 30mm ( 1-3/16 inch ), 50mm(2 inch), 65mm(2-9/16 inch),1 x SDS PLUS Shank(300mm/11-4/5inch), 1 x center positioning drill bits (110mm 4-5/16inch), 1 x Screw. This concrete hole saw set is made of tungsten steel and carbide, High hardness, rust prevention, and durability, The hole saw comes with a ventilation holes, Easy to remove dust and effectively improve work efficiency. This Concrete Hole Saw Set is Suitable for multiple materials, such as hollow brick, cement wall, concrete wall, red brick etc; Can be used to install openings for air conditioning, range hoods, water pipes, , smoke pipes, sewers, etc. Equipped with a hole saw drill bit, suitable for all major manufacturers' SDS Plus tools, Adding coolant during continuous high-speed drilling, It can prevent the drill bit from burning or breaking, Increase the service life of the product. Package: 4 x Hole saws ,1 x SDS PLUS Shank, 1 x center positioning drill bits, 1 x Screw. Colour: Material:Metal Package Contents: 1 set x Hole saws 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.