VideoSecu new design steel construction speaker mount is the ideal solution for most speakers weighing less than 4.5kg. The ball and clamp design offers flexible adjustment for the speakers to get better audio position. This bracket will fit speakers with 1/4" 20 thread, and 5mm 4mm holes. Fits key hole mounting. VideoSecu brand speaker mount, please report to Amazon if the product you received without VideoSecu brand.This mount have 1/4" 20 thread insert from 4/15/2013.