Ratchet Spark Plug Wire Crimping Tool Kit - Crimp, Strip & Seal

In this review the SPARKWHIZ Ratchet Spark Plug Wire Crimping Tool Kit is judged on whether it makes spark plug wire repairs faster and more reliable. The bottom line: this kit is best for DIY mechanics and home technicians who need a dedicated tool that both strips and crimps spark plug wires sized 8-8.5mm, and it stands out because the ratcheting jaws deliver a firm, consistent crimp without damaging the wire insulation. For anyone who frequently fits or repairs coil terminals the included brass terminals and rubber boots are a practical, ready-to-use addition.

Key Features

• Designed size fit: Works specifically on spark plug wires with diameters of 8-8.5mm, ensuring compatible crimps on common ignition cables.
• Ratcheting jaws: The ratchet mechanism and jaw design provide a firm grip that produces consistent crimps while avoiding damage to the conductor or insulation.
• Dual-function tool: Combines crimping and wire stripping so users can strip, cut, and crimp wires without switching tools, saving time during repairs.
• Comfort grip: PVC+TPR anti-slip handles reduce hand fatigue during repetitive use and improve control when crimping larger spark plug wires.
• Terminal and boot kit: Includes 24 brass terminals in 180, 90 and straight orientations plus black rubber boots to protect connections from dust and moisture.

Who It's For

This kit is aimed at home mechanics, small shop technicians, and hobbyists who work on ignition systems or any automotive circuit connections that use spark plug coil terminals. The tool is most useful when you need a consistent, damage-free crimp on thicker spark plug wires and want an all-in-one solution that strips and crimps.

It is less suited to technicians who regularly work on very small-gauge wiring or who require a broader range of terminal sizes and shapes; professionals with high-volume shop demands might prefer a dedicated industrial crimper with interchangeable dies for many different terminal types.

Pros & Cons

Pros

• Versatile dual-function design lets users strip, cut, and crimp without switching tools.
• Ratcheting jaws provide consistent crimps and a firm grip on 8-8.5mm spark plug wires.
• Kit includes 24 brass terminals and rubber boots, so most basic repairs can be completed immediately.
• Anti-slip PVC+TPR handles improve comfort for repetitive tasks.

Cons

• Tool and terminals are optimized for 8-8.5mm wire diameter only, so they are not universal for smaller gauge wiring.

Specifications

Brand	SPARKWHIZ
Compatible wire diameter	8-8.5mm
Tool material	PVC+TPR handles with metal jaws
Terminal types included	180 degree, 90 degree, straight (24 pcs)
Terminal material	Brass
Protective boots	Black rubber boots included

Our Verdict

The SPARKWHIZ Ratchet Spark Plug Wire Crimping Tool Kit is a solid value for DIYers and small-shop technicians who work with spark plug wires sized 8-8.5mm. Its ratcheting crimper and combined stripping function speed up repairs, and the included brass terminals and boots mean fewer trips to the parts bin. It is a practical, affordable tool for routine ignition work, though those needing multi-size capability should consider a more versatile crimper.

Frequently Asked Questions

Will this tool fit my spark plug wire?
The tool is designed for spark plug wire diameters of 8-8.5mm and will produce reliable crimps within that range.

Are the terminals corrosion resistant?
The kit uses high-quality brass terminals which offer good conductivity and basic resistance, and the rubber boots help protect the connection from dust and moisture.

Can the tool strip and cut wire as well as crimp?
Yes, the tool is dual-function and can quickly strip, cut, and crimp spark plug wires to complete the connection in one tool.