Some finishing touches carry weight — literally. The Brass Collar Padlock from Master Series is a small but substantial lock designed to keep bondage collars, cuffs, and restraint straps exactly where you put them, adding a satisfying sense of permanence to any scene.

Material & Construction

Built from iron and copper with a warm copper finish, this padlock is compact enough to sit flush against a collar without adding awkward bulk, yet heavy enough to feel deliberate and intentional in hand. The body measures just 0.82″ long and 0.42″ wide, while the shackle diameter of 0.12″ (3.1mm) fits through the D-ring or buckle loop on most standard leather and nylon bondage collars. Two keys are included, and the lock is non-keyed alike — meaning each padlock ships with its own unique key pair, so your keys work only on your lock.

How to Use

Thread the shackle through the D-ring or buckle loop on your collar, cuff, restraint strap, or any loop-style closure that needs to stay shut. The low-profile body sits close to the hardware without snagging or shifting. Before ordering, verify that your collar’s D-ring inner diameter accommodates a 0.12″ shackle. Collar is not included — this listing covers the padlock and two keys only.

Care & Cleaning

Wipe the metal body and shackle clean with a dry or lightly damp cloth after use. Keep the lock dry between sessions to protect the copper finish and maintain smooth shackle action. Store your spare key in a separate, memorable location.

Discreet Shipping

Your order ships in a plain brown box with no identifying labels — just your address and ours. Orders ship within 1-2 business days, and free shipping is available on orders of $69 or more. Billing is discreet as well, so your statement stays as private as your play.