Use with 2 x 2 mm leather. Glue this on with the Super New Glue or let it slide. Stays in position pretty good, actually. Fits 2 x 2mm round leather cords loosely or 3 x 1.5 mm round leather cords snuggly.
This is the Tierracast Black - a sort of Metal Noir - black like iron, but shiny.
7mm x 5mm x 5mm Hole size is approx. 2 x 2.5. (6)