These have to be some of new favorite training tools. Most dumbbells and plates increase in increments of 5 lbs. For some movements, that can be just too much of a jump. You should be making progress every time you go in the gym, be it one more rep or one more pound, but you can’t jump up 5 lbs. every time. For those times when you stall, these little guys are the best! I have used these things on everything from working my way up on shoulder presses with dumbbells to Barbell rowing. They come in 1 1/4 lb. sizes (and probably more) and I believe the bars(as seen in the second picture, the ones that attach to cable stations) come in increments of 2.5 lbs. WELL worth the investment!