I've known for some time that the auto parts chain stores had tool "loaner" programs, but was surprised to see that Autozone had a cylinder hone on their program. If you've never used their program, it's really simple. You buy any tool on the loaner program, have up to 90 days to use it, then return it to get your money back. Their hone accommodates bores from 2 to 7 inches, and worked really well for my SL350 cylinders. I chucked it up with my cordless drill and was able to deglaze and crosshatch my cylinders in short order. Better yet, I didn't have to shell out money for a tool that I'll probably never use again.