HAND STRENGTH

Do you take the time to train your Hand Strength?
For example: Crushing, Pinching and Endurance?
Throwing away lifting straps years ago, I often do some of these exercises:
Hand Grippers, Static Hangs, Plate Pinches, Wrist Curls, Towel/Rope Pulldowns and/or Rows, Finger Cable Rows, Fingertip Push Ups/Planks and Plate Walks/Farmer's Walk....last distance, 2000 non stop feet with 45lb plates.
If you do...What are some techniques you use for yourself or your clients?