120 Inch Ankle Chain: Locking and Key Options
By Training Videos | UsingASPBatons | asp-usa.com | Published: 2026-10-28
Category: Buying Guides
Learn how to choose the right locks and keys for a 120-inch ankle chain, including ASP key options and practical decision rules.
Quick answer
For a 120-inch ankle chain, choose the lock style that matches your use—standard locks for general duty, plus keys for durability—and pick a key that fits your carry setup.
Lock style: standard vs. high-security
The 120-inch ankle chain comes with two locks and four keys, giving you spares for multiple officers or backup use. Standard handcuff locks are the norm, but if you need higher security, consider upgrading to a lock that resists picking or shimming.
Your choice depends on the environment: standard locks are fine for routine transport, while high-security locks are better for high-risk detainees. The trade-off is that high-security locks may require special keys, so plan accordingly.
Key durability matters
ASP keys are designed to withstand long-term duty use, unlike conventional keys stamped from mild steel that can break or twist off in a handcuff. A broken key can jam the restraint, creating a safety hazard and potential liability.
If you carry a key on your belt or in a pocket, choose a model that is easy to locate and durable enough for repeated use. The Plus key and the Blue Line G1 Extended key offer different benefits, so consider your carry style.
Decision rules for locks and keys
- Lock type: If you need basic restraint for standard transport, choose standard locks. If you face high-risk detainees, upgrade to high-security locks that resist picking. Assess your duty environment before choosing lock type.
- Key durability: If you want a key that won't break or twist off, choose a forged and heat-treated ASP key instead of a stamped conventional key. Inspect your key regularly for wear.
- Key carry: If you need a key that is easy to locate quickly, choose a key with a BackSet tab or a case that includes an auxiliary key. Test how quickly you can access your key during drills.
Key and case options
- 120" Ankle Chain (w/2 Locks, 4 Keys): The 120 Ankle Chain includes two locks and four keys. You get spares for backup or multiple officers, reducing the risk of being locked out.
120" Ankle Chain (w/2 Locks, 4 Keys) - Plus Key: The Plus Key is a stainless steel overmolded key with dual wings. The dual wings give you a better grip and leverage, making it easier to turn the lock quickly in stressful situations.
Plus Key
Who should choose what
Best for
- Officers who need extra reach or longer restraint for transport situations
- Teams that want spare keys for multiple officers
Not for
- Officers who need a compact restraint for quick cuffing—a standard chain or hinge cuff may be more practical
