The ProX X-DS29 safely and conveniently mounts two speaker cabinets to one speaker stand. Constructed from steel this bracket mounts to most standard speaker stand shafts. It features standard 1 3/8" inserts and a black powder coat finish.   This bracket will allow mounting of two 10" or 12" speakers on a single stand.  Caution: Do not exceed safe loading weights and always protect the stand from tipping.