Serious engine builders, this piston ring squaring tool is an absolute must-have for doing the job right.

The 08930 tool handles bore sizes from 4.430 to 4.500 inches, making it perfect for a wide range of engine builds.

If you've ever tried to measure ring end gap without one of these, you know what a pain it can be - trying to keep the ring square in the bore while sliding feeler gauges in is nearly impossible.

This tool makes the process so much easier and more accurate.
Just place it in the cylinder bore, set your piston ring inside, and use the plunger to square the ring perfectly.

Then you can easily measure the gap with your feeler gauges and file if needed.

The construction is solid and substantial - at nearly 18 pounds, this isn't some flimsy tool that'll flex or break.

The packaging is about 19x9x6 inches, so it's got some size to it, but it's absolutely essential for professional-quality engine work.
Whether you're building a performance engine, doing a rebuild, or just want to ensure your rings are properly gapped for optimal compression and oil control, this tool pays for itself in time saved and better results.
No more crooked rings giving you false gap measurements that can lead to engine problems down the road.

This is one of those specialized tools that separates the pros from the amateurs in engine building.
