Gisafai 10 Pcs Concrete Hole Saw Kit Size 30 40 65 80 100 Mm Include 5 Hole Saws Generous Package Inclusion: the concrete hole saw set will appreciate the generosity of the package, as it includes 5 hole saws, 1 plus connecting rod, 1 max connecting rod, 2 center drill bits, and a plastic box for efficient storage Material Composition: this concrete hole saw kit is a testament to durability; Made from tungsten steel and cemented carbide materials, the kit is designed to withstand rigorous use during concrete drilling operations; The box that comes with the package is made from robust plastic ensuring a safe and secure storage Versatile Range of Sizes: this comprehensive drilling set comprises hole saws in a variety of sizes, about 1.18 inches/ 30 mm, 1.57 inches/ 40 mm, 2.56 inches/ 65 mm, 3.15 inches/ 80 mm, and 3.94 inches/ 100 mm; It also includes a substantial connecting rod size of 11.81"/ 300 mm and a center drill bit of 4.33"/ 110 mm; The size range adds versatility and adaptation to varied drilling requirements Innovative Design Features: enhancing functionality, each concrete saw in the kit features a ventilation hole, which can help avoid clogging; Additionally, the plus and max rod each correspond to round handle four hole and five hole electric impact drills, further enhancing the performance of this versatile tool; And the hole saw kit has a sharper blade, providing you a faster tool Broad Spectrum Application: the practicality of this concrete drill bits kit extends to a wide scope of applications; It can facilitate efficient drilling operations on concrete, cement, water pipes, brick, drilling walls, providing reliable results and ensuring project success