Check the listing for details. Campbell/Sherman &Reilly stringing block X-arm mounting base. Condition: Used. Listed at 29.00 USD. Campbell Specialty universal stringing block mounting cross arm mount. The mount works as it should and accommodates Sherman & Reilly and other stringing blocks. The mount is lacking the mounting threw bolt but any bolt would work. I have a ton of these available so if you need a bunch get with me and we can work something out.