Qjaiune 2 3/4 Inch / 70mm Hole Saw with Arbor, 2.75 Inch Hole Saw HSS Bi-Metal Hole Cutter Smoothly Cutting in Cornhole Boards, Plastic, Wood, Fiberboard, Drywall

Dimensions: Cutting Diameter: 2 3/4 Inch / 70mm Small hole saw arbor shank diameter: 10mm / 0.4 inch, total length of Shank: 97mm / 3.8 inch Package Content: 1 x Hole saw 3 x Center bits 1 x Hole saw arbor 1 x Allen wrench Feature: *Bi-metal material for cutting of steel, aluminum, brass, wood, plastic, recessed light,plaster and drywall. *The teeth is sharp and vibarition is less, which enable more stable operation and make the hole can be cut with quick speed and balance. *The hole saw drill bit is equipped with chip removal holes, which largely improve the speed to clean chips. How to Cut Successfully: #1 Install the pilot hole and the hole saw #2 Holding the drill straight to cutting surface and drill as clockwise rotation #3 When starting drilling, cutting at a slow speed and holding steady pressure #4 Then the hole saw cut hole in no time. Warmly Note: 1.Please remove the spring on the pilot bit when you are drilling a hole on the materials with over 10mm thick. 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 drill rotary speed, or the centre bit may be shattered on first use.