FIT KIT LOCK ROD

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