This slave collar is about as strict as it gets. The collar is two inches wide with our tubular locking mechanism. All stainless steel construction with a shiny burnished finish. Perfect for leading a slave through a floor of spectators or tying off while exhibiting. See matching wrist and ankle manacles in the restraints section for more description on how the locking mechanism works. Three sizes: 14, 16 and 18 inches, other sizes are considered custom and are available, allow additional lead time. Engraving details are below.