This Michael's Fat Boy Limited Edition Teslacoil Ballpoint Pen is the 1st Limited Edition with a spring-loaded, bolt-on clip, machined from a solid bar of aluminum. The barrel features tightly wound copper wire screwed down with stainless steel bolts simulating the windings found in electric motors. Only 288 BP/Gel Retractable Pens (Parker Style Refills) in Black or Silver will be available worldwide. Michael's Fat Boy has been manufacturing “Great American Made Gifts! in the heartland of America for over 5 Years.