5mm Mosaic Pin Pins Knife Handle Custom Knives Blank Blades Brass Copper Steel for Hunting Knives We use only the highest quality brass, copper and steel.Our mosaic pins have been vacuum-pumped to remove air bubbles. The resin is pulled in with a high-end vacuum, which pulls the glue down, and removes any small bubbles. The pins are cured afterward and lastly polished and burrs removed.The center of the mosaic pin is filled with clear epoxy resin. The filling will appear dark when initially received, however light will be able to shine through when you are done cutting this down to small pieces for your knife handle. The transparency will become evident with the smaller length pieces. As a note: It is possible to drill a knife blank's pin holes larger (or create your own pin hole locations). You simply need to use drill bits intended for drilling metal, which are capable of drilling through hardened high carbon steel. This method is recommended because you be able will get the exact fit you are looking for when using our mosaic pins.