DURI bi-metal hole saw set, 20mm-100mm

A DURI bi-metal hole saw set is a practical way to drill clean circular openings across common building and DIY materials, from wood and plywood to drywall and thin metal. With an arbor and pilot bit included, you get a more controlled start to each hole, which matters when you are cutting for ceiling light installation or fitting components. This 9 pack covers a useful spread of sizes, so you are less likely to be held back by having the wrong cutter on the bench.

If you regularly work with partitions, ceilings, and mixed boards, you will appreciate the bi-metal construction described for increased durability and cutting performance. The set is also built around easier core removal and chip clearing, using a spring loaded mechanism and a dedicated chip removal design to help reduce time spent on debris. 🛠️

Key points

This DURI hole saw set is made to handle everyday drilling tasks where accuracy and speed both matter. The cutters are described as high quality high speed carbon steel combined with bi-metal, with a design that aims for higher hardness, toughness, and stronger wear resistance. In practice, that means fewer worries about the teeth dulling too quickly when you are moving between jobs and materials.

You also get a pilot bit and arbor, which help you locate the hole before committing to full depth. That can be especially helpful when you are working overhead for a ceiling light fitting, where rework is not ideal. There is a spring loaded mechanism for core removal, and that is there to push out the cut disc and help clear chips, reducing the effort needed during drilling.

The 9 pack size range is set out as 20, 25, 32, 50, 60, 70, 75, 80 and 100 mm, covering many common fittings and cable or mounting cut outs. The product description also notes practical cutting depth guidance depending on the size, which is useful when you are planning a clean, consistent result.

Finally, the set’s wide application profile covers a range of boards and materials like drywall, plasterboard, wood and plywood, plastic and PVC plasterboard, plus thin metal sheets. It is a straightforward choice for DIY projects and general building material work when you want one kit that can keep up. 🔧

Tech specs

• Name: DURI Bi-Metal Hole Saw Set with Arbor and Pilot Bit
• Type: Hole saw cutter set
• Material: high speed carbon steel & bi-metall
• Colour: not specified
• Sizes included: 20, 25, 32, 50, 60, 70, 75, 80, 100 mm
• Cutting depth guidance: below 50 mm size effective cutting depth 30 mm, above 50 mm size effective cutting depth 35 mm
• Mechanism: spring loaded ejector for core removal and chip push out

What’s included

This pack is described as a 9 pack hole saw set, supplied with the arbor and a pilot bit. That combination is important because the pilot bit helps you begin the cut with a more accurate location, then the hole saw follows through to the required diameter. The description also refers to a spring loaded ejector spring on the drilling bit for easier core removal and chip clearing.

The hole saw design also includes a dedicated chip removal pathway, intended to improve debris clearance and reduce blockage. When you are working through materials like drywall, plywood, or thin metal sheets, keeping the cutting area clear helps maintain drilling speed and supports a smoother result. 🧱

For typical ceiling and fitting work, having multiple diameters in one kit lets you match the hole size to the installation, without hunting for individual cutters. Sizes range from 20 mm up to 100 mm, so it covers small openings as well as larger cut outs that can come up in furniture and common building material tasks.

There is one practical limitation to keep in mind, the effective cutting depth varies with the chosen hole size as described in the product information. If you are cutting deeper than the stated effective depth, you may need to adjust your approach and work carefully to avoid forcing the cutter.

Where it shines

It makes sense if you want a single bi-metal hole saw kit for mixed DIY jobs, where you might alternate between wood, plywood, drywall, plasterboard, plastic, and thin metal sheets. The bi-metal construction is described for durability and stronger wear resistance, which is useful when you are doing repeated drilling rather than one off use. It also suits projects involving ceiling light installation, because accurate hole starting and easier disc removal can reduce the frustration of repeated adjustments.

You will like it if you appreciate a set that focuses on practical drilling flow, including chip evacuation support and a spring mechanism that pushes the disc out after drilling. The description notes that the ejector and chip clearing features aim to reduce shock during drilling and help prevent damage to the insert and hole saw.

It might not be a great match if your workflow relies on very specific, niche hole depths beyond the effective cutting guidance, or if your jobs demand a single fixed diameter every time. For most everyday building material and DIY fitting work, though, the 9 size spread and the included arbor and pilot bit give you solid coverage for getting the job done. ✅