The Carlo Biagi base bracelets have no threading and will accept any competitor bead since the bracelet diameter is approx. 4mm. So feel free to mix and match your beads using this thought -. If the hole size of the bead is larger than 4mm it will work!! Nearly all of the listings at Bead Lovers Korner have a section in the item specifics that will tell you the hole size and if it has threading inside the bead.