As with machine shop operations, it is often necessary to hold objects whilst doing other operations. An example is when using a dial indicator.
A Noga Arm device is often employed for this, and it is often held on a base which has a magnetic switch built in.
There are other brands of these, and they can be found inexpensively at many online merchants.
Additional pictures of this device
Examples of work produced with this device
Examples of this device in use
How it works
Notes on making one
- Amplitude Adjuster for an MDF Rose Engine by Rich Colvin. Ornamental Turners International Newsletter, Volume 26, No. 2 - Winter, 2019, pg. 23
Disclaimer: eMail comments to me at OTBookOfKnowledge @ Gmail.com. The process of woodturning involves the use of tools, machinery and materials which could cause injury or be a health hazard unless proper precautions are taken, including the wearing of appropriate protective equipment.