This aluminum beam protector is very smooth and is molded to fit your beam perfectly. If you are using very fine and delicate threads on an old and rough beam, using the aluminum beam protector will ensure that your warp threads do not snag. Likewise, if you are using hard warp yarns under tight tension, such as linen rug warp on a new loom, the aluminum beam protector will protect your beams from developing grooves.
This movie demonstrates how to insert the beam protector under a warp that is already on a loom. First the warp tension is loosened, then the beam protector is slid into place. In order to secure the beam protector to the loom while no warp is in place, simply tie a string around each end.