Rob Allen's Roller Gun Rubber Anchor is composed of thick, sturdy stainless steel and is manufactured by Rob Allen, so you can count on its longevity. This spare part is meant to offer a stable mounting anchor for a Rob Allen roller gun and can even be used to convert your speargun to a roller. Designed for use with all Rob Allen spearguns that have Vecta or Vecta 2 handles. The anchor replaces the screws that secure the handle into the barrel of the gun for a firmer anchor point when employing a high-powered roller setup.