Greenlee 891 Bi-metal Hole Saw Kit 9-piece

Product Description

The GREENLEE 891 is a 9-piece bi-metal hole saw kit designed for cutting through a range of materials including aluminum, fiberglass, plastic, steel, tin, and wood. The kit includes nine hole saws in sizes 3/4, 7/8, 1, 1-1/8, 1-3/8, 1-3/4, 2, 2-1/4, and 2-1/2 inches, along with two arbors and one adapter. The bi-metal construction provides durability and cutting performance across both ferrous and non-ferrous materials. Electricians, plumbers, HVAC technicians, and general contractors reach for this kit when roughing in conduit, pipe, or duct penetrations through a variety of substrates.

This kit is suited for residential and light commercial applications where multiple hole sizes are needed on a single job. Common use cases include panel knockouts, junction box cutouts, cable and pipe penetrations through wood framing, metal studs, plastic enclosures, and fiberglass panels. The broad size range makes it practical for trades that need to carry one kit rather than individual saws for each application.

Key Features

• Bi-metal construction for cutting aluminum, fiberglass, plastic, steel, tin, and wood
• Nine hole saw sizes included: 3/4, 7/8, 1, 1-1/8, 1-3/8, 1-3/4, 2, 2-1/4, and 2-1/2 inches
• Two arbors and one adapter included for immediate use out of the box
• Black finish on saw bodies for corrosion resistance during storage and use
• Single kit covers the most common penetration sizes for electrical and mechanical trades

Compatibility

Designed as an OEM-style kit replacement compatible with standard arbor-drive hole saw setups used across electrical, plumbing, and HVAC rough-in applications.

Installation Notes

Hole saws in this kit are installed by a licensed electrician, plumber, or HVAC technician using a standard corded or cordless drill with sufficient torque and RPM control. Always secure the workpiece before drilling and reduce feed pressure as the saw breaks through to prevent binding or kickback. Confirm that the arbor is fully seated and the locking mechanism is engaged before operation. Follow applicable NEC, IPC, or IFGC sleeve and firestopping requirements when penetrating rated assemblies.