The spring-grip is made of high quality aluminium alloy material， very durable. You may exercise your strength of hand， wrist and forearm and build up your muscle.

Features:
It is very simple to use and convenient to carry.
High quality aluminium alloy handle makes it very durable.
Carbon steel spring makes it has good elasticity.
An excellent training tool to strengthen your hands， wrist and forearm.
You can start with a lower level to a higher strength level.
It is a perfect training tool.

Specifications:
Type: Spring-grip
Material: Aluminium alloy & Carbon steel
Color: Gold / Silver(optional)
Model: 100LB / 150LB / 200LB / 250LB / 300LB / 350LB(optional)
Weight: 209 - 272g / 7.37 - 9.59oz
Package size: 14.5 * 12.3 * 3.2cm / 5.71 * 4.84 * 1.26in
Package weight: 245 - 310g / 8.64 - 10.93oz

Package List:
1 * Spring-grip

Note:
Please allow 1-2cm (0.4-0.8") differences due to manual measurement， thanks.