Review on Efficient 110V/250W Deluxe Tire Grooving Iron Tool for Superior Results by Kevin Grizzle

This is a very well made product that works great! Used it to spin R4 tires on a compact tractor. The only thing I will change is the square nuts that hold the blades to the head. They are too small and when you tighten the blade clamp screw they twist and don't fit well on the shoulder on the head. It takes some effort to push the tire through the rubber and works best when the tires are room temperature or warmer. Also, the underside of the head will collect a small amount of rubber debris that will need to be scraped off from time to time, but usually not much if you remove it quickly. I tried lubricating my truck tires by flipping the groove knife, but didn't notice the hoped-for increase in traction on ice and snow. Maybe it's good for race tires, but the R4's grooves really pay off by increasing traction on snow and ice. Will definitely buy again.