You do db squats or something? Why?
Don't buy the 9 pounds per finger thingy. If you want a gripper, buy a captains of crush gripper or two. I bought a no 2, which was way too heavy for me. I can rack pull 485 without grip becoming an issue but only close that thing once. So I should have bought a no 1 or no 1,5.
But I never got much carryover from grippers. Heavy kroc rows and power cleans helped my grip much more.