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More like this: leather collar, collars and locks.

Sterling silver padlock w/ spring loaded shackle. $33.30

Sterling silver "padlock". Spring-loaded clasp. £12.89

Custom-made sterling silver padlock by Chris Parry. Locks w/ screw.

"Darby style" steel collar. Interesting lock style. $60

Phoenix - Locking Steel Necklace $98

Cartier "Love" bracelet. "Locks" on w/ screw. I prefer the white gold. Someday when we're rich I will commission them to make one of these as a collar. $6000

Nickel free, pewter "beads" rest securely on four stainless steel cables which are attached to black leather straps by pewter rivets. The straps buckle at the back with two locking buckles, which accept padlocks. There used to be a 2-strand version called Blix, but they don't seem to be available anymore. $205

House of Dior metal collar

Flexible steel collar w/ magnetic ball closure. Ball w/ attached ring available. € 74.00

Combination lock collar. 1.2cm heavy steel. In two sizes: female: inner diameter 12cm (up to 37cm neck size) male: inner diameter 16cm (up to 50cm neck size) €44.95

"Stealth Collar" steel collar w/ no visible screw or hinge pin. 1/4" thick. Removable o-rings included w/ order. Pendant bails available. $130

Rolled steel collar w/ o-ring & allen screw "lock". Available w/ inset gemstones. $130

Aluminum collar w/ allen screw "lock". 3/8" thick $100

"Teardrop" steel collar available as padlock-locking or allen screw locking w/ permanent o-ring in front. Also available w/ inset gemstones. $130

"Phantom" Eternity collar w/ dark grey finish. Allen screw "lock" $90

"Fantasy" collar by Eternity Collars. Limited edition. Allen screw "lock". $125

Titanium eternity collar (lighter than steel + would match our wedding bands). Allen screw lock. $150

Silver-plated tag w/ custom engraving 21 x 20 mm approx £4.99

Solid silver tag w/ custom engraving. 15 x 15 mm

Custom engraved brass padlocks for collars. £15.99

Steel rope collar. Lockable w/ padlock. Also available w/ black or red pvc coating. £44.99 £44.99

PVC-covered steel rope w/ allen screw lock. Removable o-rings available. £39.99

Black leather collar w/ beaded organza overlay. Locking post closure available. $67

Red & black leather collar w/ red d-ring.$70