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.
Whenever you can make a workout more time-efficient, you're stacking the odds heavily in your favor. Not only do you complete your training in less time, but you've also got more time to recover before the next onslaught!
If you're an athlete or a gym rat, how much should you be able to deadlift? Two times your bodyweight? Three times? Or is the better question should you even be deadlifting at all?