Buy a standard wrist roller if you want, but a homemade version of PVC pipe (1.5 to 2 inches is perfect) with climbing webbing attached is a cheap and amazing solution.
Check our power-rack version that we made out of aluminum tubing. The beauty of it in a rack is that you can truly test the grip without the shoulders giving out first.
Learn to apply force quickly and it'll make you stronger. That's what speed training is all about: power, explosiveness, and strength. Try this before you plateau.
Our cub reporter went to Sin City to do some swinging and sweating, but not the usual kind. He was there to learn the basics of kettlebell training with our own Mike Mahler, and to share that knowledge with you.