[ Contains]: 1 x Hole Saw Bits, 1 x Connecting Rod, 1 x Pilot Drill Bit, 1 x Hex Bolt. [Premium Material]: The hole saw set for cement made of tungsten steel and cemented carbide is strong and long-lasting. And it is sturdy enough to drill through hard stone and concrete, Cuts. [Advantages]: Anti-hammering,fast drilling,equipped with ventilation holes,free to remove dust generated during the drilling process,and effectively improve the efficiency of drilling. [Wide Application]: This masonry hole saw kit easily drills through most common wall materials (brick, , concrete, cement, and stone) to let you install AC tubing, water pipes, exhaust hoses, and more! Colour:As Shown Material:Metal Size:55mm Package Contents: 1 * Drill set 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.