Spartacus Locking 3 1.5 inches with mini bondo rings. Whether you wear your collar for heavy-duty play, for style or as a symbol of submission, the Spartacus locking collar gives you the most options. Enjoy the caress of the soft leather lining. Experience the excitement of full restriction when the lock clicks shut. Feel the satisfaction of heavy duty, handcrafted artisan leather, with special attachments for all your favorite games. Comfort, style and control experience them all in Spartacus leather. Padlocks sold separately. Adjust around neck 14 inches to 19 inches with 3 bondo rings and sturdy triangle attachment in the back.