These Eco Pro Pegs are designed to hold your tungsten weights in place when Texas Rigging or using any other fishing application where you need to make sure your weight is not going to slip up and down your line. No other pegging system works as well. 3mm size fits 1/16 to 1 oz worm weights or the 3/8 to 1/2 oz flipping weights. The 5mm larger size fits 1/4 to 1 1/2 oz flipping weights. Both sizes come in clear color 10 packs.