What are some effective ways to build grip strength for wrestling?

iv done the wrist roller since a long time ago, even up to 20 pounds on it but it doesnt seem to really translate into grip strength atleast not what iv noticed. iv alo been using these metal grippers, not captian of crush but one of them has up to 150 pounds of tension, i can close that one but just barely. also have a 100 pound/50 pound gripper too, how effective do you think grippers are and whats a good workout plan with them? btw can daily chores like squeezing a wet mop dry also help with grip strength? Oh and iv been doing deadlifts, but usually i lose my grip on it rather then it being too much for my legs/back. but would the deadlift also be a good exerises for grip strength?