If you want ordinary “card” loop was samarastroydetal like spring-loaded, easy to upgrade. For this of eyes loop is extracted axial rod, and the reverse installation is put one or two springs so that their ends rested on the loop. Eyes for necessary for this file.
Recommend to read
Overrunning Clutches Instead of a Differential
The need to have a nimble and reliable motorized assistant at my personal disposal I (like, probably, many others in a similar situation) felt with particular acuteness when I became the...
THE TRAILER-TRUCK
Trailers for passenger cars, turning them into a small truck, particularly popular with rural residents and owners of summer cottages. Naturally they greatly facilitate the delivery of a...