My luck with grease guns is that they usually have about 15 pumps in them. You can't waste that much grease but just about the time you get a 2-3 zerks into the job you need to go back into the shop to reload. Darn things.

Brother has a snap-on box from Tech. He's trying to sell it if anyone may be interested. We've found that Snap-On doesn't grow any better than SK, or crafstman, or whatever....although hired man did find a pair of Cee-tee pliars in a soybean field when he got out to change a section.