【13 HOLE SAW BLADES and 39 ACCESSORIES】13 x bimetal hole saw blades, 13 x mandrels, 13 x drill bits, 1 x box. Each hole saw set is fully matched and individually packaged, which effectively avoids the drill holder cannot be removed and other saw blades cannot be used after one size of saw blade is used. 【HIGH PERFORMANCE】The hole saw uses a heat-treated M42 bimetal saw blade and the cutting part is made of high-quality high-speed carbon steel. The product has the advantages of high temperature resistance, no deformation and long service life. The diameter is 18, 20, 22, 25, 28, 30, 35, 38, 45, 50, 55, 65, 75mm and the maximum cutting depth/thickness is 25mm 【CUTTING DESIGN】The sawtooth features an arc design, concentric precision, uniform tooth edge, impact resistance and anti-fall. The hole saw set features a non-binding, sharp-edged design that is easy to cut. After drilling, the spring of the drill automatically pushes the disc out of the saw. 【WIDE APPLICATION】Suitable for metal