WELT SAFE-LOCK

Engineers' Extension Tripods, Camera Tripods with Multi-Section Extendable Legs, Three-Way Pan Heads, Collapsible and Adjustable Dollies for Tripods, Multi-Section Extendable Unipods, Background Supports, Tristrut Multi-Section Height-Adjustable Light Stands, Stand and Lamp Arm Units for Photographic Copying, Height-Adjustable Speaker Stands, Wheeled Supports for Video Cameras and Movie and Slide Projector Stands