Complete 56-piece Bi-metal Hole Saw & Mandrel Set – A Size For Every Hole You'll Ever Need

Product Specification Shipping Refund Product Specification COMPLETE 56-PIECE BI-METAL HOLE SAW & MANDREL SET – A SIZE FOR EVERY HOLE YOU'LL EVER NEED If there's a hole that needs cutting, chances are this set has the size for it. The Benchmark Abrasives Complete Bi-Metal Hole Saw & Mandrel Set brings together every Benchmark bi-metal hole saw size from 9/16" through 6" — 51 individual diameters — along with all five Benchmark hole saw mandrels. From small pass-through holes and precise fabrication work to large openings for electrical, plumbing, HVAC, maintenance, and construction, this is the complete hole saw lineup in one set. Every hole saw features shock-resistant and shatter-resistant bi-metal construction with cobalt-matrix high-speed steel cutting teeth laser-welded to a tough alloy-steel body. The 4/6 variable-pitch teeth and positive rake angle promote fast, clean cutting with reduced chatter, while the 1-1/2" cutting depth handles common construction materials and side cutouts make plug removal easier after the cut. With five mandrels covering 1/4", 3/8", and 7/16" hex shanks and both 1/2"-20 and 5/8"-18 hole saw threads, this set gives a shop, maintenance department, contractor, or serious fabricator an unmatched range of hole-cutting options without having to hunt down individual sizes later. Product Specifications Specification Details Set Size 56 Piece Hole Saw Count 51 Hole Saw Size Range 9/16" to 6" Mandrel Count 5 Cutting Depth 1-1/2" Tooth Pitch 4/6 Variable Pitch Tooth Geometry Positive Rake Angle Cutting Edge Cobalt-Matrix High-Speed Steel Hole Saw Construction Bi-Metal, Laser-Welded Cutting Edge Hole Saw Threads 1/2"-20 and 5/8"-18 Mandrel Shank Sizes 1/4", 3/8", and 7/16" Hex Pilot Drills Included with Mandrels Country of Origin Made in USA Features Every Benchmark Hole Saw Size – Includes all 51 bi-metal hole saw diameters from 9/16" through 6". A Size for Nearly Any Job – Covers everything from small wiring and fabrication openings to large plumbing, HVAC, electrical, and construction penetrations. All Five Benchmark Mandrels Included – Includes the full 1/2"-20 and 5/8"-18 mandrel lineup with 1/4", 3/8", and 7/16" hex shank options. Shatter-Resistant & Shock-Resistant Construction – Tough bi-metal hole saw bodies withstand the impact and vibration common in demanding cutting applications. Cobalt-Matrix High-Speed Steel Teeth – Durable cutting teeth provide strong wear resistance across wood, ferrous metals, aluminum, plastics, and other supported materials. Laser-Welded Bi-Metal Design – High-speed steel cutting teeth are laser-welded to alloy-steel bodies for a balance of cutting performance, strength, and flexibility. 4/6 Variable-Pitch Teeth – Variable tooth spacing helps reduce chatter while promoting smoother, faster cutting. Positive Rake Angle – Aggressive tooth geometry helps the cutting edge engage efficiently for quick, clean cuts. 1-1/2" Cutting Depth – Provides useful cutting capacity for common construction, maintenance, fabrication, and installation materials. Easy Plug Removal – Side cutouts provide access for clearing chips, debris, and cut plugs after drilling. Multiple Hex Shank Options – Choose the mandrel that best matches the drill chuck and hole saw thread required for the job. Made in USA – Benchmark bi-metal hole saws and mandrels are Made in USA. Mandrel / Hole Saw Range The 1/2"-20 mandrels are published for Benchmark hole saw sizes from 9/16" through 1-1/8". The 5/8"-18 mandrels are published for Benchmark hole saw sizes from 1-1/4" through 6". Use a matching 1/2"-20 mandrel for the 1-3/16" saw. Applications & Performance This complete size assortment is designed for professional and general-purpose hole cutting in materials such as: Wood and wood framing 2" x 4" lumber Plywood Sheet metal Ferrous metals Aluminum and other non-ferrous metals Wood composites Plastics Rubber Drywall and sheetrock The 9/16" through 6" size range provides broad coverage for: Electrical conduit and cable pass-throughs Junction and device box openings Plumbing pipe and tubing penetrations HVAC installation Fabrication and metalworking Automotive and mechanical repair Industrial maintenance Equipment installation Facility maintenance Wood framing and construction Shop and general repair work Cobalt-matrix high-speed steel cutting teeth provide wear resistance at the cutting edge, while the alloy-steel bodies add toughness and flexibility. The 4/6 variable-pitch pattern balances cutting speed with smoother engagement across different materials and thicknesses. Machine Compatibility Designed for use with compatible rotary drills and the correctly matched Benchmark hole saw mandrel. The five included mandrels provide 1/4", 3/8", and 7/16" hex shank options for compatible three-jaw drill chucks and cover both major Benchmark hole saw thread families. Compatible examples include: DEWALT® DCD991 and DCD996 Milwaukee® 2903-20, 2904-20, 2807-20, 2410-20, and 2411-20 Makita® XPH14Z, XAD03Z, and XAD05Z Use the correct arbor for the saw, match its shank to the drill chuck, and choose a drill suited to the hole diameter and material. Operate in rotary mode with hammer action off. The range of saw sizes lets you choose the diameter and mandrel for the job. Match each setup to your drill's capacity. Large-diameter hole saws require appropriately rated drills and greater control because torque increases substantially as diameter increases. The 7/16" hex mandrels should not be assumed to directly fit locking 7/16" quick-release systems solely because the shank width matches. The retention geometry required for those interfaces has not been established. Safety Tips Wear eye protection and appropriate hearing and respiratory protection. Keep hands, gloves, and loose clothing clear of rotating parts. Secure the workpiece before drilling. Match the hole saw to the correct mandrel thread and published diameter range before use. Confirm that the mandrel, pilot drill, and hole saw are fully assembled and tightened before operation. Make sure the drill chuck securely grips the mandrel shank. Use rotary drilling mode only; do not use hammer action with a hole saw. Confirm the drill manufacturer's hole-saw capacity for the selected diameter and material. Use an appropriately powered drill for larger-diameter hole saws. Use appropriate drilling speed and pressure for the material and hole diameter. Reduce pressure as the hole saw approaches breakthrough to help prevent grabbing. Allow the tool and workpiece to cool when cutting metal; use cutting fluid when appropriate. Stop the drill completely before clearing chips, removing cut plugs, changing sizes, or adjusting components. Do not use a damaged, cracked, excessively worn, bent, or distorted hole saw, pilot drill, or mandrel. Frequently Asked Questions How many hole saws are included? The set includes 51 individual Benchmark Abrasives bi-metal hole saws. What size range is included? Every Benchmark bi-metal hole saw size from 9/16" through 6" is included. Are intermediate sizes included, or only common sizes? Intermediate sizes are included. This is the complete Benchmark bi-metal hole saw size lineup, not simply a selection of common diameters. How many mandrels are included? All five Benchmark hole saw mandrels are included. What mandrel shank sizes are included? The set includes 1/4", 3/8", and 7/16" hex shank options. Which hole saw threads are covered? The mandrel assortment covers both 1/2"-20 and 5/8"-18 Benchmark hole saw threads. Which sizes use the 1/2"-20 mandrels? The published mandrel range covers 9/16" through 1-1/8" hole saws. Which sizes use the 5/8"-18 mandrels? The published mandrel range covers 1-1/4" through 6" hole saws. Which thread does the 1-3/16" hole saw use? It uses a 1/2"-20 thread. Choose a matching 1/2"-20 mandrel for this hole saw. Do the mandrels include pilot drills? Yes. Each of the five Benchmark mandrels includes a pilot drill. What materials can the hole saws cut? They are designed for wood, plywood, wood composites, ferrous metals, aluminum and other non-ferrous metals, sheet metal, plastics, rubber, drywall, and similar supported materials. What is the cutting depth? The hole saws have a 1-1/2" cutting depth. What does 4/6 variable pitch mean? The tooth spacing varies between approximately four and six teeth per inch, helping reduce vibration while providing smoother cutting across different material thicknesses. Which drill models can I use with this set? Compatible examples include DEWALT DCD991 and DCD996; Milwaukee 2903-20, 2904-20, 2807-20, 2410-20, and 2411-20; and Makita XPH14Z, XAD03Z, and XAD05Z. Choose a matching mandrel for the selected saw and check the drill's capacity for your hole size and material. Other machines may also meet these requirements. Can I use the hole saws in a hammer drill? A hammer drill can be used only in standard rotary drilling mode with hammer action turned off. Who is this set best suited for? It is ideal for fabrication shops, industrial maintenance departments, electricians, plumbers, HVAC installers, contractors, mechanics, facilities teams, and users who want the complete Benchmark hole saw range available without purchasing individual sizes as needed.