Milwaukee 49-56-9645 Bi-metal Hole Saw 4 Inch

Product Description

The MILWAUKEE 49-56-9645 is a 4-inch diameter bi-metal hole saw designed for general-purpose cutting across a wide range of materials. Built around a 3.5 TPI tooth geometry, this saw delivers extended tooth life in metal applications and is engineered to run efficiently on cordless tools. The thermoset coating reduces heat buildup during the cut, and the all-access slot design speeds up plug removal while improving pilot bit visibility and chip ejection. At 1-5/8 inches cutting depth, it handles standard wall thicknesses in both metal and non-metal substrates. It is manufactured in the USA and sold individually.

This hole saw is suited for use by electricians, plumbers, HVAC technicians, and general contractors working on residential and light commercial installations. Typical applications include cutting through thick and thin metals, aluminum, drywall, plastics, wood, and wood with embedded nails. The 3.5 TPI design is optimized for material engagement that reduces tooth stripping in abrasive or layered materials, making it a practical choice for repetitive production cutting as well as single-trade service work.

Key Features

• 3.5 TPI tooth design engineered for extended life in metal cutting applications
• All-access slots for faster plug removal and improved pilot bit visibility
• Thermoset coating reduces heat and is optimized for cordless tool use
• 1-5/8 inch cutting depth handles standard wall and panel thicknesses
• Suitable for thick and thin metals, aluminum, drywall, plastics, wood, and wood with nails
• Made in the USA

Compatibility

Designed as an OEM-style replacement or standard bi-metal hole saw for use with any 3/8-inch or larger drill or hole saw arbor accepting industry-standard shank attachments. No specific model compatibility was provided in the product data.

Installation Notes

Installation and use should be performed by a qualified tradesperson familiar with rotary cutting tools. Always disconnect or power down the host drill before changing or inspecting the saw. Use appropriate cutting fluid or lubricant when cutting ferrous metals to extend tooth life and manage heat. Follow applicable safety codes and manufacturer drill speed recommendations for the material being cut.