A popular collar of the "echidna" type, with the construction of a chain, the links of which are terminated with protruding, bluntly ended ends of the wire.
The spikes are set at such an angle that they do not dig into the skin.
Both ends of the proper collar are additionally connected by a clamping chain intensifying the training effect.
The product is made entirely of chrome-plated steel.
Adjustable by subtracting and adding spike meshes.