The Diablo DHS09SGP 9-Piece General Purpose Bi-Metal Hole Saw Set is a multi-material hole saw kit for drilling clean holes in wood, plastic, aluminum, metal, and stainless steel. This is a hole saw set designed for general purpose hole cutting with a hand held drill or drill press. Model Number: DHS09SGP. If you need a compact kit that covers common hole sizes and keeps changeovers simple, this one is built around that job.

What makes this set worth a look is the balance between range and speed. You get five bi-metal hole saw cups in common sizes: 7/8 inch, 1-1/8 inch, 1-3/8 inch, 1-1/2 inch, and 2 inch. That size spread works well for electrical rough-in, plumbing penetrations, hardware installs, sheet metal work, and general repair jobs where you are bouncing between materials and hole diameters.

The standout spec is the 60 mm, or 2-3/8 inch, cutting depth. Diablo states that gives you 40% deeper holes in one pass versus standard bi-metal hole saws. On the job, that means fewer partial cuts and less messing around when you are trying to get through thicker stock cleanly. For anyone drilling through framing, layered material, or thicker assemblies, that extra depth is not just a number on paper. It saves time.

Diablo also builds this kit around its Snap-Lock Plus mandrel system. Instead of treating the mandrel like an afterthought, the system is meant to make cup changes quick and straightforward. That matters when you are moving from one hole size to another during a run of install work. The tool-free plug ejection feature is another practical upgrade. Removing stuck plugs is one of the most annoying parts of using hole saws, so anything that speeds that up is a real benefit, not fluff.

The variable tooth design is there for a reason too. Faster cuts with less vibration means better control, cleaner work, and less chatter when you are cutting through mixed materials. In real use, that can help the saw feel more settled in the cut, especially with a hand held drill. It is a feature that speaks directly to cut quality and control, not just speed.

From a system standpoint, this kit is flexible. The included one-size mandrel fits all Diablo hole saws from 5/8 inch to 6 inch diameter, and Diablo also states it is for use with all hole saw brands. The included adaptor nuts cover two size ranges: the 1/2 inch threaded adaptor fits diameters from 9/16 inch to 3-1/16 inch, and the 5/8 inch threaded adaptor fits diameters from 1-1/4 inch to 6 inch. Minimum chuck size required is 3/8 inch, and the shank style is hex, so it is built to work with common drill setups.

This set makes the most sense for electricians, plumbers, HVAC installers, maintenance techs, remodelers, and serious DIY users who need one kit that can handle a broad mix of materials without dragging a full truck-box of separate saws to every job. If you mostly drill occasional service holes and want common sizes, quick setup, and deeper cutting capacity, the Diablo DHS09SGP 9-Piece General Purpose Bi-Metal Hole Saw Set is the kind of kit that earns space in the van.

Diablo DHS09SGP 9-Piece General Purpose Bi-Metal Hole Saw Set Keeps the Basics Covered

This is a smart hole saw kit for the guy who needs common sizes, multi-material capability, and quicker changeovers without buying a much bigger set.

• Who it's for: Electricians, plumbers, HVAC installers, remodelers, maintenance techs, and serious DIY users doing regular hole cutting in mixed materials.
• Why it stands out: The 2-3/8 inch cutting depth, Snap-Lock Plus mandrel, and tool-free plug ejection all solve real annoyances that slow hole saw work down.
• Worth knowing: This is a focused 9-piece set, not a huge master kit. If the included sizes match your day-to-day work, it is a strong buy. If you need a wider spread of diameters, step up to a larger set.

• What materials can this hole saw set cut? It is designed for wood, plastic, aluminum, metal, and stainless steel, and the listed material applications also include duct and sheet metal, fiberglass, gypsum, PVC, plaster, steel, and wood with nails.
• Can I use this with a hand drill? Yes. Diablo states it can be used with a hand held drill or a drill press.
• What chuck size do I need? The minimum chuck size required is 3/8 inch.
• How deep will it cut? The cutting depth is 2-3/8 inches, or 60 mm, which Diablo states is 40% deeper than standard bi-metal hole saws.