. Grooving your own tires is incredibly easy and the Ideal Tire Groover is great for the job. I have deflated my BF Goodrich KM2 tires for winter traction with this device and have had no problems (you flip the blade over to use as a shim). This definitely takes a long time (you can't rush), and make sure you get a pair of good but cheap thick gloves before using them (I accidentally touched the hot component with the side of my finger and my gloves got ahead of me saved from a bad one). burn). The price is reasonable for this tool and I suspect I can use it for many years. This particular slide comes with a #4 head and #4 blades and they are perfect for my needs.