Robust chest rings with adjustable sharp spikes developed by us. The steel rings are solid and square in shape with a material Ø of 8mm. The sharp spikes drilled into it are adjustable and removable. The distance to each other is adjusted using leather straps. The neck strap is fixed and the back strap is adjustable and lockable. Chest circumference 90-115cm adjustable. Can also be shortened. The diameter of the chest rings is 11cm. Weight approx.: 480 grams. Material stainless steel and leather.