2-1/8" ROUGH-IN HOLE SAW

What it is

• Brand: Diablo (Freud Tools)
• Type: Carbide rough-in hole saw
• Series: Demo Demon™ CTR
• Model: DHS2125CTR
• Function:
  • cuts 2-1/8" diameter holes
  • used for HVAC, plumbing, and electrical rough-in work
  • optimized for nail-embedded wood + mixed-material cutting

Key specs

• Diameter: 2-1/8 inch
• Cutting depth: 2-3/8 inch (60 mm)
• Tooth type: Carbide-tipped
• Mount system: Snap-Lock Plus™ mandrel compatible
• Materials:
  • wood (including nail-embedded)
  • drywall
  • fiber cement
  • shingles
  • plastic
  • light metals

Key features

• Carbide teeth for up to 50× longer life vs bi-metal hole saws
• Faster cutting geometry (higher productivity in rough-in work)
• Deep-cut body for single-pass holes
• Tool-free plug ejection system
• Compatible with DHSAR mandrel + extension system

Verified identifiers (important correction)

• MPN: DHS2125CTR
• UPC: 008925163695

Bottom line

• ✔ Fully standardized Diablo OEM hole saw
• ✔ “CTR” = carbide rough-in / demo-grade version of 2-1/8" DHS platform
• ✔ Not a drill bit family (DSPD/DSF/DSD) — this is hole saw system (DHS series)
• ✔ Designed for aggressive framing + mixed-material cutting