
Overview
The Mueller Kueps 457 720 Line Wrench Kit Large is a professional 7-piece set specifically designed for precise and damage-free work on various automotive lines and sensors. This comprehensive kit is ideal for servicing brake lines, power steering lines, air conditioning lines, hydraulic lines, and even oxygen (O2) and nitrogen oxide (NOx) sensors. Featuring a robust drop-forged construction, a corrosion-resistant chrome finish, and an innovative stepped flange design, these wrenches ensure a secure grip and minimize the risk of rounding or damaging sensitive fittings.
Key Features
- Comprehensive 7-Piece Kit providing a selection of the most commonly used large metric line wrench sizes.
- Specialized Stepped Flange Design securely grips fittings, significantly reducing the chance of slipping and rounding delicate line nuts and sensor housings.
- Inner Hex on Both Ends offering versatility and allowing for different working angles and access points.
- Durable Drop-Forged Construction from high-quality chrome-vanadium steel for exceptional strength and long-lasting performance.
- Corrosion-Resistant Chrome Finish protecting the wrenches from rust and corrosion, ensuring reliability in various working conditions.
- Versatile Applications suitable for a wide range of automotive, HVAC, and hydraulic system maintenance tasks, as well as sensor removal and installation.
Specifications
- Brand: Mueller Kueps
- Part Number: 457 720
- Quantity: 7 Pieces
- Sizes Included: 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm
- Material: Chrome-Vanadium Steel
- Finish: Chrome Plated
- Design: Double End with Inner Hex and Stepped Flange
Applications
The Mueller Kueps 457 720 Line Wrench Kit is an essential tool for automotive technicians and mechanics specializing in brake system repairs, power steering maintenance, and air conditioning service. HVAC technicians will find these wrenches invaluable for working on refrigerant lines. Professionals in hydraulic system maintenance can rely on their secure grip to prevent damage to sensitive fittings. Additionally, the stepped flange design makes these wrenches particularly well-suited for the removal and installation of oxygen and NOx sensors, minimizing the risk of costly damage to these components.
Performance and Characteristics
The drop-forged chrome-vanadium steel construction of these line wrenches ensures exceptional strength and durability, allowing for effective torque application without the risk of tool failure. The high-quality chrome finish provides excellent resistance to corrosion, extending the lifespan of the kit. The key performance characteristic is the innovative stepped flange design, which provides a more secure and encompassing grip on line fittings and sensor nuts compared to traditional open-end wrenches, significantly reducing the potential for rounding or stripping. The dual-end design with an inner hex on both sides offers added versatility for accessing fasteners from different angles, making work in confined spaces easier and more efficient.
Additional Information
Working with sensitive automotive lines and sensors requires specialized tools that prioritize precision and prevent damage. The Mueller Kueps 457 720 Line Wrench Kit Large is designed with this critical need in mind. The stepped flange shape is a key differentiator, providing enhanced grip and protection for valuable components. This 7-piece kit offers a comprehensive selection of commonly used larger metric sizes, making it a valuable investment for any professional or serious DIYer who frequently works on automotive fluid lines, HVAC systems, or sensors. The robust construction ensures that these wrenches will withstand the demands of regular use, providing reliable performance for years to come.
Ensure precise and damage-free work on sensitive lines and sensors. Add the Mueller Kueps 457 720 Line Wrench Kit Large to your professional toolkit today!

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