The DeWalt 20V Max Cordless Grease Gun is on sale for just $158 right now. Shoppers say it works so fast they've dubbed it “the Usain Bolt of grease guns.” ...

If you go that route, it will cost you $151.99 at the time of this writing. Amazon also carries DeWalt's full 20V Grease Gun Kit, which is selling for $251.61.