I assemble steam engines from cast parts and never liked the standard "set screw on flat surface" flywheel attachment, but figured the right broaches only came in large sizes. This brooch set is made for a small job - the brooches fit in the palm of my hand. I didn't need an arbor press either; I placed the flywheel on two 1-2-3 blocks in a vise and used a pen to push the baby squeegee through. Don't forget to go to Grainger and buy a set of baby keys. First-class model for work in the workshop.