Washers are a common fastening element in hybrid ESF and circular ESF frames. Like many fasteners in these frames, they are available in two basic sizes for mini and standard CESF and hybrid ESF frames as well as different styles.

Allows capture of fixation wires to rings (or rods) at locations otherwise occupied by supporting elements. Also utilized for drop-wire technique.  

Used as a mated pair (nut and washer) for adjustment of a hybrid rod or threaded rod angle - approximately 10º range of motion

Provides needed fill or offset during frame construction to maintain wire alignment; often used to offset a third wire being placed on a ring.