Can someone tell me the size screw/bolt is needed

[weswait]

to fit in screw insert in the lower right hand corner of the bse plate

 

[peter halle]

You probably should provide some more information - like what tool you are speaking of.

 

[nclemmons]

If that's a Shaper Origin, that hole is designed to hold a camera mount. It's thread is 1/4 20

 

[weswait]

see pic

 

[weswait]

thanks, i couldn'it in the manual