Over the years this logo has evolved a lot. It started with a drawing by the owner of a machine shop. For a while he had used a bio-hazard logo. Given the nature of his technical business, it caught his eye because he liked integrated patterns. A few years later he drew up a new more detailed sketch involving elements he works with at his shop, and had me redraw it on the computer using the L shape as the first letter in his shop name. The last evolution came when he asked if I could incorporate elements of each design into one logo. We reused his special 7 sided bolt in the center paired with his beloved bio-hazard and then added some gearing teeth to increase the geometric shaping and keep the machine shop feel.