Buy a few of the cheap ones at Harbor Freight when they are on sale for a buck. Seriously, they are a wear item and you'll go through even the expensive ones if you are using them much. I bought one of the fancy plastic ones off of the Snap-on truck for over $10 and ended up giving it back after one use, the post brush rotates in the plastic housing and they've been that way for years! The cleaner with the scrapers rather than the brushes work too well, they remove a lot of lead and make it harder to tighten the terminal down. They also don't work worth a **** on the sheel metal terminals a lot of the newer cars are using.