Made of steel material, with reasonable design and practical functions. Excellent craftsmanship makes it have the characteristics of high strength, no burr, weather resistance, high hardness, wear resistance, and resistance to deformation. With this drill bit, hole drilling, provide fast and smooth drilling. Do not hesitate to take this set of drill bit home! Features -Color:Multi -Material:Steel -Size:6.00X3.80X3.80cm/2.36X1.49X1.49in -Opening hole diameter: 1-1/2 Inch(38mm) -Length:60mm/2.36" -Hole Depth: 40mm/1.57" -Outstanding workmanship, vacuum brazing technology, provides longer working life (generally 3-5 times). -Steel material, it is more durable and wear resistant, provides very high efficiency, cuts faster, sturdy and strong. -With compact shape, lightweight and portable, take up no space and you can put it anywhere. -Dry or wet drilling for ceramic tile, porcelain tile, marble, stone, granite, masonry, brick, etc. -Both wet and dry drilling is possible, using water to extend working life and improve efficiency. Package list: 1 Core Drill Bit