This lug (also known as a shield) is designed to cover the mounting points on the outside of the casket where the bolt-through style swing bar arm connects to the casket. Each lug covers two swing bar arms. The lug can be installed with two wood screws. Typically, the lug snaps in place after the swing bar arms are installed with brass clips (sold separately). Typically use 3 lugs per long side and 1 lug on each end of the casket for a total of 8 lugs for one casket.