A system and method are provided that allow for direct measurement of relative movement and relative velocity of movement of a crane boom tip in relation to a target load on an adjacent vessel deck allowing real-time determination of work load parameters under then-current conditions. A compact and low-power laser light image can thereby be formed and seen by an observer from outside the properly constructed three-dimensional projection surface. The bottom surface is a rocker that provides a moving fulcrum for prying out the nail, giving maximum force when the nail is first gripped and smoothly moving to maximum speed of extraction as the fulcrum moves back towards the user. The resilient spring contacts are manufactured using photolithographic techniques to form the contacts on a release layer, before the spring contacts are epoxied to the support substrate and the release layer removed.