Knuckle assemblies are available with knob adjustment. Knuckles came with 1/4-20 male/female threads and lock ring.
I use a mount knuckle on my monopod. It's smaller and lighter (much cheaper) than a comparable camera mount. It adds some flexibility when I don't want to carry a tripod.
82-6060 - AC Power Transformer; 16.5VAC, 40 VA
16.5VAC, 40VA power transformers for security applications. Features a plug-in ground and auto-resetting overload protection. Mfr. #ELK-TRG1640.
82-8485 - Video Coax Surge Protector
Protects valuable CCTV equipment from high voltage surges such as lightning strikes and voltage spikes.
I found a lot of electronic equipment that other stores do not have, the information on your website is very comprehensive and the prices are very convenient.