Hole Saw Kit,3PCS Hole Saw Set 76mm 102mm 108mm,Drill Bit for Metal and Wood,HSS Bi-Metal Hole Cutter with cutting Depth of 32mm for Punching Circular Holes on Ceiling Board, Acrylic Panel

• 【Complete Hole Saw Set】76mm(3inch) hole saw, 102mm(4inch) hole saw, 108mm(4-1/4inch) hole saw, 1 drill bit for replacement, 1 arbor (with drill bit), 1 hex key
• 【Advanced Material】These hole saw in frosted black is created with high quality cobalt high speed steel with a high hardness(69HRC) and compressive strength, compared with high carbon, high chromium die steel, it has better toughness and wear resistance, strong and sturdy for long-term use.
• 【Variable Pitch Teeth】The Hole Saws have a progressive tooth strip for a powerful bite, the bi-metal construction increases protection by eliminating the risk of breaking, and provides shock resistance for clean cutting. And the variability allows you to cut according to your chosen material at different speeds.
• 【Quick and Accurate Cutting】 The increased hardness of the alloyed technology and optimized tooth geometry allow our hole saws to provide quicker and accurater cutting than standard hole saws, the difference of cutting diameter are allowed less than a millimeter. Accelerated chip clearance with knock-out slots to permit slug removal.
• 【Circular Hole Cutter】The hole saws are suitable for cutting Wood, Plastic, Mild Steel, Stainless Steel, Cast Iron, Brozen, Cupper, Aluminium etc. They are perfect cutting tools for installing recessed lights, down lights into ceiling or floor, for punching big holes at wall to fit vent pipes or extract fans, for drilling holes on desk or drywall for cables installation.

ITOOLFIRM HSS Bi-Metal Hole Saws, advanced edition:Frosted Black. Features: Extreme Resilience & Long Lifetime. Powerful Bite & Accelerated Chip Clearance. Knock-out slots permit slug removal. Variable pitch teeth reduce harmonic vibration. Hex Shank works with standard or Quick Change mandrels (Quick Change requires adapters). Can be used in Cordless, Electric, Air Drills, Drill Press, Lathe and Milling Machines. Reinforced shoulder for added strength and longer life. Suitable for cutting viariable materials: Wood, Hard Wood Floors, Plywood. Plastic, Fiberglass, UPVC / PVC, Acrylic, Glass. Steel, Cast Iron, Stainless Steel, Alloyed Aluminum, Bronze, Copper. Applied to: Punch holes for household wood, galvanized pipe, fire hose, Gypsum, Upvc/PVC Boards. Install downlights, ceiling recessed lights, vent, fans, cable. Instructions: Pre-drill using light contact pressure. Continue drilling with minimal, even pressure. Avoid oscillating while drilling. Allow hole saw to “air” when using with wood and wood alternatives. The saw comes to a complete stop on your material before pulling it away.