MikePA
Super Moderator
With the Lincoln, you put the hose on the zerk, pull and hold the trigger and either count the clicks or watch for grease . Each click represents grease being pumped. I can't imagine why a variable trigger would be needed. Perhaps someone with one could explain. I can grease all the zerks on my tractors without running out of battery power. I've never counted how many zerks. You aren't going to blow off a boot with one of the Lincolns.