Venator1

I'm new to holster making and would like to replicate this IWB style for myself. Could anyone tell me exactly what hardware components are needed to make this kind of snap arrangement for an IWB holster? The snaps say Pull the Dot, but I have no idea what type of screw or female fitting is sandwiched between the leather layers. (A T-nut, perhaps?) Where can one find this hardware, or the neomdymium magnetic version of this hardware? Thanks,