Used two of these with brake and two without brakes in building a rolling pedestal base for my Bosch RA1181 router table. I wanted a sturdy mount and the stud is 12mm in diameter approximately 1" long which works perfectly in 3/4" material. I used 12mm T-Nuts to anchor the casters to the base board. The installation with a 1/2" washer on the bottom side provided a very strong and solid attachment. These casters have a two way lock-up mechanism that inhibits wheel and swivel rotation. Making it an ideal caster for mobilizing tools such as large miter saws, thickness planers, router tables, and sanders. I have used the flat plate, four hole version of this caster in a portable miter saw stand build as well as two large portable work tables and they work very well. I would definitely recommend these to a friend.