How to Choose: Measure your bar before placing an order. 24mm are for the 24mm bar, 25mm are for the smooth 1 inch standard bar. If your bar is threaded, choose a small size. Ask the seller if you are not sure. Strong & Sturdy: Durable and not easy to break. Stainless steel will not rust, It can prevent the weight from falling off the 1 inch barbell. Excellent spring tension and fit keeps your plates immobile. Workout partner: Let you enjoy the power of barbell at home or in the gym more at ease. This Dumbbell & Barbell Clamps will be your best choice. The compact structure makes it a perfect companion to go with the rest of your home gym equipment. Suitable for Use on Home ,Multi and all Commercial Gym equipment. Easy to use: A quicker, one-handed way to secure weight on the bar: clamps with the snap lock are so difficult to put on, but spring collars work well right out of the box. Very easy to install and remove WITH ONE HAND, based on the elongated and oversize handles. these clips are comfortable to use. The handles are comfortable, the rubber on the handles would not come off ely.