Manual wedge grips facilitate specimen clamping, centering and positioning. After clamping the specimen, the clamping force increases as the test load increases. The grips are designed so that the jaws move while the jaws do not move, which results in almost no preload during specimen clamping. This is particularly useful for testing high-strength materials such as metals and composites, ensuring that the specimen does not slip.

The high load range of wedge grips is suitable for static tensile testing of metals and composites.