Fishing sinker weight acting as barbs. Claw sinkers are used in surf fishing on sandy bottoms with strong currents, mainly to prevent the sinker from getting carried off with the current. Upon casting a claw sinker, the line is briefly tugged so that the claws will dig themselves into the sand, allowing the rig to stay in place. An ideal material for a fishing sinker is environmentally acceptable, cheap and dense. Density is desirable as weights must be as small as possible, in order to minimize visual cues which could drive fish away from a fishing operation. In ancient times as well
Arbor press pedestal. The base is usually constructed of cast metal. A "ram" provides the force; it may be square or round. The ram is usually driven by a rack and pinion setup, to improve the mechanical advantage. Higher force arbor presses have another gear reduction. Forces are usually generated by manual or hydraulic input. Arbor press An arbor press is a small hand operated press. It is typically used to perform smaller jobs, such as staking, riveting, installing, configuring and removing bearings and other press fit work. Punches, inserters, or other tools/dies may be added to the end of the ram