This CTA Tools pinion flange holder is one of those specialized tools that makes differential work so much easier if you're working on Ford vehicles. The universal design with ½” slots fits flange bolt centerlines up to 2-5/8”, covering most Ford, Lincoln, and Mercury models. It comes with both 5/16” and 3/8” bolts, nuts, and washers so you have everything needed for various applications. The tool is built to safely handle the torque needed for pinion nut adjustments without slipping or damaging the flange. I've used this on several Ford differential repairs, and it's held up perfectly - much better than makeshift methods that can be dangerous. The quality feels professional grade, comparable to the Ford factory tool #303-126 but at a more accessible price. If you're doing your own differential work or running a shop that services Ford vehicles, this tool provides that secure holding power you need for proper pinion nut torque specifications. Definitely beats struggling with pipe wrenches or other improvised methods that can lead to damaged components or improper preload settings.