Lisle Master Plus Disconnect Set — compact quick-disconnect tools for fuel, A/C & transmission lines in molded case

The Lisle 39850 Master Plus Disconnect Set is a compact molded case containing the most commonly used quick-disconnect tools for fuel, A/C, and transmission oil cooler lines.

Whether you service domestic or import vehicles, this all-in-one kit brings the connectors and adapters technicians reach for most often into a single, organized case. The set combines specially shaped tools for fuel line quick-connects, spring-lock couplings, air conditioning line couplings, and transmission oil cooler fittings so you can access and release lines cleanly and safely without improvising with screwdrivers or pliers.

Which lines and fittings does this kit work with?

The Master Plus Disconnect Set covers the common quick-connect styles found on fuel systems, A/C service ports, and transmission oil coolers. It includes drivers sized to engage internal tabs and collars so plastic or nylon fittings aren’t damaged during service. Use it when removing fuel rails, replacing A/C components, or servicing cooling line connections.

• Fuel line quick-connect tools sized for typical domestic and import fittings
• Spring-lock coupling drivers for secure clip disengagement
• Air conditioning line coupling adapters for metal and nylon lines
• Transmission oil cooler disconnect tips to release sealed fittings

How does the molded case improve shop workflow?

The tool set is housed in a purpose-molded case that keeps each piece visible and retained, reducing time spent searching for the right size. The compact layout makes it easy to grab the set for mobile jobs or to store on a workbench. Color-contrasted inserts and molded cavities help you confirm all parts are returned after a job.

• Custom-molded slots for quick identification and secure storage
• Compact footprint fits toolboxes and service carts
• Durable plastic case protects tools from dirt and loss

What materials and build quality can I expect?

Each disconnect tool is manufactured to withstand repeated engagement of plastic and metal fittings without bending or deforming. The tips are shaped to distribute force over the coupling, minimizing risk of cracking brittle nylon fittings. Components are corrosion-resistant for longevity in shop environments.

• Sturdy, non-marring tool profiles to protect fittings
• Corrosion-resistant finishes for workshop durability
• Precision-formed tips for consistent release action

Who is this for: The Lisle 39850 Master Plus Disconnect Set is designed for professional mechanics, automotive technicians, and experienced DIYers who regularly service fuel, air conditioning, or transmission oil cooler lines. It suits busy shops and mobile technicians who need a reliable, organized assortment of disconnect tools to speed routine maintenance and reduce the chance of damage when separating quick-connect couplings.