The collar is made of genuine full grain leather. It is three inches wide, which is safer and more comfortable for active dogs. Durable buckle and D-ring for leash attachment are made of nickel plated steel. Nickel plating protects it from corrosion and adds a captivating silver shine. 5 rows of interchanging spikes and pyramids arranged in symmetrical lines is the decoration for those, who know the price of beauty and for those, who know how to deal with these spiky edges for them to be safe for surrounding creatures. See it yourself. Words are futile, when things speak for themselves.