Lennox Y1479 – Klein 600-4 1/4" Keystone Screwdriver, 4" Heavy-Duty Square-Shank

 

Lennox Y1479 – Klein 600-4 1/4" Keystone Screwdriver with a 4-inch heavy-duty square shank is a professional-grade hand tool designed for HVAC technicians, installers, and service professionals who require maximum durability and torque. Manufactured by Klein Tools, this high-performance keystone-tip screwdriver provides exceptional control, grip, and long-term reliability under demanding field conditions. The square-shank design allows the user to generate additional leverage using a wrench, making it ideal for stubborn fasteners commonly encountered in HVAC equipment, Lennox units, electrical panels, and mechanical assemblies.

The precision-machined 1/4" keystone tip ensures a secure fit against screw heads, reducing cam-out and preventing wear. The cushion-grip handle delivers superior comfort and slip resistance, improving accuracy during repetitive use. This Lennox-distributed Klein screwdriver meets professional standards for durability, heat treatment, and corrosion resistance, making it a trusted tool in every technician’s service bag.

This part number Y1479 is supplied through Lennox for use across residential and commercial HVAC service tasks, though it functions as a universal tool suitable for all mechanical, electrical, and industrial applications requiring a 1/4" keystone driver.

 

Key features include:

• Heavy-duty 4" square-shank shaft for increased torque
• 1/4" keystone tip, precision-machined for secure screw engagement
• Cushion-Grip handle for comfort, slip resistance, and improved control
• Heat-treated steel construction designed for professional durability
• Compatible with wrench-assisted turning for high-torque fastening
• Ideal for HVAC service, Lennox equipment maintenance, electrical work, and general mechanical applications

 

Technical specifications:

• Tip style: 1/4" keystone
• Shank length: 4 inches
• Shank type: square
• Handle type: Cushion-Grip
• Material: Heat-treated, high-strength alloy steel
• Application: HVAC, electrical, mechanical fasteners