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Extension Spring Gripper
Watch the Video - Extension Spring Gripper (WMV)
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Extension spring grippers differ from torsion spring grippers in that resistance opposing closure of the gripper is generated via extension of the springs, opposed to compression. The extension springs are typically attached to the gripper handles via hooks, allowing for easy modification of gripper resistance.
Knurled handles resolve the common problem with extension spring grippers.
The most common extension gripper is the Ivanko Supergripper. This gripper is approximately the size of a pad of paper and provides an almost unlimited range of difficulty for little more than the cost of a single torsion spring gripper. The tool is not as popular as the torsion spring grippers, largely due to complaints over the comfort of the handle.
