They are made of CNC milling machine with precision thousandth, 0.001 mm, thanks to these values accurately fused leads are perfectly balanced and concentric, very important factor when you must reach depths of considerable depth. Do you think that an imbalance of lead due to the mass concentric or irregular can bring your bait far away from the desired location, obbiquamente down, adding to the factor of current. There are molds for many figures of weights are already on the market and new ones, for achieving substantial depth at different speeds of descent, and which are affected more or less of the current according to the shape which they possess.
For larger weights also have hooks ready MEASURE 2 (see the characteristics of the model), 304 stainless steel wire and stainless steel AISI 315L, 1.0 and 1.5 mm, visit the hooks.