Why use Fitteroy Premium Heavy Duty Exercise Handles? Fitteroy handles are made with Acrylonitrile Butadiene Styrene (ABS), a super strong and durable plastic. The handles have extra wide grips, measuring 5.5" with a soft foam finish for comfort to help prevent soreness after workouts. The handles also give you a non-slip firm grip while implementing your workout regimen. They can be used with many different gym cable machines as well as resistance bands. Fitteroy fitness handles come with large metal O rings that can accommodate up to 8 resistance tubes at the same time. The rings are seamless. There is no need to worry that they will open while working out!! Fitteroy Premium Gym Handles have all the features you are looking for, and more!