Rubber toe caps to be used on the bottom bracket in the practice of rehabilitation exercises for leg and arm muscles. These toe caps are made of solid black rubber for maximum durability and strength. Specially manufactured to be used on each end of the Prim basic bottom bracket. They are designed with grooves on the bottom, which prevents the device from slipping, regardless of the condition of the surface on which it rests. At the same time provides stability, preventing the device from swinging, to provide greater safety and effectiveness when performing rehabilitation exercises. The set is composed of four tips and the diameter of each of the tips is 20 mm.