Description: Condition: Brand new and high quality. Features: - Cut perfect circles with these hole saws. - Specially alloyed tool body with HSS teeth. - Features enhanced tooth geometry to cut faster. - Feature thicker blade improve durability. - Positive and aggressive tooth rake angle. - Suitable for hard plastic, wood, Iron, mild metal, Acrylic, MDF, aluminum, Etc. Specification: Material: M42 Bi-Metal Drill Diameter: 71 mm Center Drill: HSS twist drill Ø 6 mm Shank Diameter: 10 mm Cutting Depth: 25 mm Tatal Length: 85 mm Compatible Device: Electric drill, Bench drill Package Includes: 1 x Hole Saw 1 x Twist Drill Bit Note Tips: 1.Hole saw may become overheated due to fast rotary friction, we suggest customers to use cutting fluid to keep the hole saw cold during usage. 2.Keep the drill be stable when drilling, otherwise the centre bit may get snapped due to excessive shaking. 3.Start drilling with a slow rotary speed, Avoid the centre bit may be broken on use.