A Fit Kit Lock Rod is a prosthetic accessory used with pin-lock (locking liner) suspension systems. It helps securely connect a prosthetic limb to the user’s residual limb.
What it is
- The lock rod (or locking pin) is a small metal rod that attaches to the end of a prosthetic liner (usually a gel or silicone liner).
- When the user puts the prosthesis on, the rod slides into a lock mechanism inside the prosthetic socket and clicks in place.
What a “Fit Kit” means
A fit kit usually includes:
- Lock rods of different lengths or sizes
- Sometimes different thread types
- Tools for adjustment
This allows the prosthetist to choose the best-fitting rod for comfort, limb length, and socket depth.
How it works
- The liner with the lock rod is worn on the residual limb
- The rod enters the socket lock as the prosthesis is donned
- The lock grips the rod, holding the prosthesis firmly in place
- A release button or pull cord is used to remove the prosthesis
Why it’s used
- Provides secure suspension (prevents the prosthesis from slipping off)
- Easy to put on and take off
- Helps maintain consistent limb positioning
- Common in below-knee (transtibial) prostheses
