Features:

Made by latest dynabender safety dual spring-quality carbon steels
Second Spring keep much safer when exercising
There was a "second" noise when releasing it
Perfect for building upper body strength
High grade steel with molded plastic grips
Until Now Max Springs Power 120kg to Challenge your Extreme
Specifications:
Materials:Quality Carbon Steel Springs and Non-Slip Plastic Handle
Weight:20kg,30kg,40kg,50kg,60kg,80kg,100kg , 120kg for you choose(Also range about from 66-176LB)

A. Please Make sure you have enough power to use the 50KG or 60KG or 80KG , 100kg, 120kg Level;
B. Please Make sure your wrist wear the hand strap before training.
Prevent accidental injuries.