FORTOMORROW 3pcs/lot 1/2" Shank Router Bit Round Over Bead Glass Door Router Bits Set For Woodworking Cutter Tool

I have never used these but the round cutter makes the inner edge of a cabinet door where it meets the glass. This is a still a rail type door. The opposite/matching bit creates the proper end cuts for the stiles to fit the rails. I suppose the rabbet bit curs the back edge for the glass on the back side.

Disappointed....need instructions on how to use it!