Product name: Alloy Hole Saw Specification: 100mm Machine: Electric drill /Bench drill Working depth: 28mm Applicable materials: stainless steel less than 4mm, aluminum alloy, iron, angle iron, cast iron less than 20mm Precautions:1. Check whether the center drill is tightened, turn on the machine and check the concentricity of the hole saw. When drilling, place the hole saw perpendicular to the metal, otherwise the alloy fall off easily. It is best to use cutting fluid to cool down the thick metal 2. Please follow the drilling speed table when drilling, otherwise it is easy to damage the hole saw 3. When using a hand drill, make sure that the hole saw is perpendicular to the metal, it is best to use a bench drill to operate. Colour:Silver Material:Cemented Carbide Package Contents: 1 x Alloy Hole Saw 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.