The Flexible Whistle Alert threads into a spark plug hole to quickly identify the compression stroke, and its flexible design allows placement in tight or hard-to-reach areas where rigid tools won’t fit.
Features:
- Eliminates the need for an extra hand
- Excellent for use on deep, recessed spark plug threads
- After installation, your hands are free to complete the job
- Also available: #7882 Whistle Alert (Rigid)
- Made in the USA; Lifetime Warranty
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