Meccion Bi-Metal Hole Saw Drill Bit HSS Fast Hole Cutter with Arbor and Centring Drill for Wood, Sheet Metal, Plasterboard, Iron, Plastic (3-9/16"(90mm)) - MSHS05

• M42 Bi-Metal Hole Saws - The hole saws is made of high quality M42 Bi-metal with increased wall thickness for longer sevice life. Cut a Perfect Circles - The sharper tooth combines optimized design providing a smoother, faster cut without vibration for operation more stable.Max depth: 30mm Excellent Design - The spring on the center twist drill bit would automatically pushes the disc out of immediately after completing the hole. Wide Application - The hole cutter adapted to electric drills and bench drills, suitable for mild steel, sheet metal, iron, wood, plywood, plasterboard, plastic, MDF, aluminium, tube, Etc. Operation Caution - Start drilling at a slow speed. Use cutting fluid to keep the hole saw cold. Hold the drill steady while drilling to avoid breaking the center chisel.