black mountain products bar grips are 2 inch thick and crafted from a durable non-slip rubber. The internal diameter of the grips is an appropriate size to match any kind of weight barbell, dumbbell, pull-up bar, or kettlebell. The thick grip adaptors are made with a durable non-slip rubber with a cross hatching design for brought grip. Barbell grips are first-rate for fast growth in forearm and biceps power and size. Fat grips assist to reduce calluses, hand ache, and pressure in your joints as compared to using popular metallic bars. Each set of suppose grips comes with a manufactures lifetime guarantee.