Weight straps help enhance your workout by improving your grip on weight bars. They are usually used on heavyweight exercises like dead lifts and shrugs but can also be used with dumbbells for exercises like curls. The straps help you get better results because they allow you to push your muscles further. As your muscles fatigue your grip weakens, which will cause you stop your exercise sooner than you have to. After all, it's hard to focus on getting those last reps in when you're worried about dropping the weight on your foot. Moreover, with certain exercises like shrugs, your grip unaided by a strap probably cannot handle the weight you are capable of lifting.
Cut the belts to size. The belts should be cotton double D belts. Measure the belts starting at the end with the buckles and draw a line at the 2 feet mark. Cut the excess belt off.
Melt the ends. Run a lighter flame briefly across the ends where you cut to prevent fraying.
Put on the weight straps. Run the ends of the belts through the double D rings. This will form a loop for you to put your hand through. Tighten the loop so it is snug around your wrist. Place your hands on the bar and wrap the ends of the belts around the bar. Rotate the bar towards you to tighten the straps.
If you do not have double D belts, you can use a cloth military style belt with the buckle removed and make a loop on one end using a sewing machine or fabric glue. If you need some padding, wear wrist bands under the straps.