* Hand knob tightening screw are made of high quality material, very very sturdy, anti-rust, reusable and durable.
* Thread clamping star knobs make removing inspection panels easy.
* Hand star knob is easy to work, much easier to get on and off than a regular nut.
* Thread clamping star knobs make removing inspection panels easy.
* Hand star knob is easy to work, much easier to get on and off than a regular nut.
* Threaded Stud:Zinc-plated Steel
* Knobs Head:Plastic
* Knobs Head:Plastic