Bull Boost Performance Adjustable range of the push rod length checker is 6.80" to 7.80"

These work very well determining your pushrod length. I really like them

Nothing

I just got my product today. Although it seems like a decent product, the packaging was TERRIBLE. It came in a flimsy bag, no instructions AND my pushrod had fallen out of the bag and was just sitting in my mailbox with the rest of my mail. Luckily it didn't get lost. They get a D- for packaging and a B+ for the actual product.