L H Dottie Co CT56 Carbide Tipped Hole Cutter 3.5 in

Product Description

The L H Dottie CO CT56 is a carbide tipped hole cutter designed for cutting clean, precise holes in electrical boxes, panels, and enclosures. Carbide tipping extends blade life compared to standard bi-metal cutters, making this tool well suited for repetitive hole-cutting tasks on job sites. Electricians, plumbers, and HVAC technicians reach for this type of cutter when clean knockout work is required and speed matters. The CT56 cuts a 3.5-inch diameter hole and is sold as an individual unit.

The CT56 is used in commercial and residential applications where larger-diameter holes are needed in sheet metal, electrical enclosures, junction boxes, or similar materials. It is a common tool for electricians roughing in conduit entries or installers fitting pipe and cable pass-throughs. The carbide tipped edge holds up well when cutting through painted or galvanized steel surfaces encountered in both new construction and retrofit work.

Key Features

• Carbide tipped cutting edge for extended tool life on metal surfaces
• 3.5-inch diameter cut for larger knockout applications
• Single-unit sale — no multi-pack minimum required
• Suited for sheet metal, electrical enclosures, and box knockouts

Compatibility

Designed as an OEM-style replacement or standard hole cutter for use in residential and commercial electrical, plumbing, and HVAC rough-in applications requiring a 3.5-inch diameter hole.

Installation Notes

This hole cutter is typically used by licensed electricians, plumbers, or HVAC technicians. Always de-energize and lock out electrical panels or equipment before cutting. Use a suitable arbor and drill press or heavy-duty drill at the manufacturer-recommended RPM for carbide cutters. Wear appropriate eye and hand protection when cutting sheet metal or enclosures.