Have for sale for $40 (+ shipping if required) one of these:
RAPALA PGLW20 LOCK'N WEIGH 20 Pounds scale/capacity
The ProGuide Lock'n Weigh makes landing, handling, weighing and releasing big fish a safe and easy operation. The cam-lock jaws are designed to use the fishes weight to securely hold the fish without causing injury. Constructed of high grade stainless steel it will provide years of service. Adjustable wrist lanyrd and non-slip handle keep the Lock'n Weigh secure.
Lock N Weigh Review - Rapala ProGuide Lock'n Weigh fish gripper lipper tool