Grip test has shown to be a reliable source to test maximum voluntary muscle strength using a hand dynamometer. A standard grip test can is used to assess hand and wrist weakness in association with monetary workman's compensation claims. Grip testing has many roles, but two of the most important remain to identify sincerity of effort and the ability to identify potential weaknesses among employees.
Here are normal measurements:
Right Handed Males - R: 104lb, L: 103lb
Left Handed Males - R: 92lb, L: 100lb
Right Handed Females - R: 63lb, L: 63lb
Left Handed Females - R: 54lb, L: 56lb
Source: WorkSTEPS - Employment Testing