It’s a Rockler nail set! www.rockler.com/spring-tool-set?country=US&sid=V91040&promo=shopping&PL&gclid=Cj0KCQjwzqSWBhDPARIsAK38LY8t4kwqGtP3PJKDA40ngtG-AWQmcVDVIdPnwbYRSbZO9ZSAPxICM3kaAucjEALw_wcB
You could have attached the top and used the router to cut out the area for the miter saw ... And actually around the entire top and it would fit perfectly...😂😂😂