Pakcage: Hole saw diameter:4-5/16Inch(110mm); 1 x 220mm sds plus connecting rod; 1 x 110mm center positioning drill bits; 1 x positioning drill screw. Material: The concrete hole saw kit made of tungsten steel and alloy, high-frequency welding technology, welding openings is very strong, smooth inside and outside welding mouth. Ultra-sturdiness and , easy to opearation, and long service life. Wide applications: The masonry hole saw bit set fits sds plus shank on the connecting rod works with sds plus tools by all major manufacturers. Easily drills walls, stones, bricks, or installation of air-conditioning, oil fume exhauster, sewer pipeline hole open and so on. Tips: Since the hardness difference of the stones/bricks, hole saw need a bit more time than normal, please use it with flowing water when work on high hardness material, it reduce the abrasion of the hole saw. design: The masonry hole saws blade is made of raw materials, thicker and than other ordinary blades. It can easily penetrate steel bars up to 6mm. Colour:As Shown Material:steel Package Contents: 1 * Concrete Hole Saw Kits 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.