MADI Tri-Penta Wrench – 4-in-1 Transformer & Gear Access Tool

All-in-One field tool for transformer access and more

The MADI Tri-Penta Wrench is engineered as a rugged, multi-function tool designed to handle common underground utility tasks. Its ¾” Penta Socket is purpose-built for transformers and switch gears, offering a reliable path to fast access when time matters on the job site.

A standout feature is the green Speed Sleeve in the handle. The sleeve spins freely, helping operators loosen latches and gears up to 2X faster than standard penta sockets or wrenches. This design aims to reduce effort and increase efficiency during critical tasks, particularly in tight or awkward spaces.

In addition to the socket, two practical components live inside the handle: a 3/8” screwdriver for opening doors and a built-in Lid Lifter to lift hand hole lids. By consolidating these tools, the Tri-Penta Wrench minimizes tool swaps and keeps essential functions within easy reach while working.

Key benefits at a glance

• 3-in-1 core functions: socket, screwdriver, and lid lifter integrated into a single tool.
• Removable Penta Wrench designed to access all transformers and switch gears.
• Integrated Lid Lifter enables safe, hands-on lid handling without extra equipment.
• Speed Sleeve speeds up transformer and gear access with a free-spinning handle.
• Durable alloy steel construction for longevity in the field.

Designed for durability and reliability

Crafted from heat-treated alloy steel, the Tri-Penta Wrench is built to withstand regular use in demanding environments. A powder-coated finish adds rust and corrosion resistance, helping maintain a clean, functional tool over time. The open end design supports steady engagement with fasteners, while the overall mechanical operation emphasizes efficient tightening and loosening with less effort.

As a trusted MADI product, this wrench reflects a practical balance of design and real-world usability. It’s a versatile choice for teams that value redundancy, compactness, and a single, capable tool for common transformer and service tasks.