Topo engraved black zirconium 91mm scales for swiss army sak. Clip option: you can now select to add any benchmade clip to any of the 91mm swiss army knife scales. Add these scales to your cart and the clip of your choice to order or just select the scales + clip option in the dropdown menu and i will send a matching clip to your scales. Pen & needle cutouts: you can also request the scales to have the cutout for the pen & needle. Fitment is at your own risk unless you order it with the swiss army knife that i install for you. Black zirconium: pure zirconium (zr atomic number 40) is a lustrous, grey-white, very strong, lightweight and hypoallergenic metal that closely resembles hafnium and, to a lesser extent, titanium. Zirconium is extremely resistant to heat and corrosion and it is lighter than steel. Through my own heating process, i create a unique appearance, that’s called “black zirconium” or “oil slick”. Through this high heat, a layer of extremely hard black oxide grows on the metal. This thin black layer is much harder than pure zirconium, which does not rub off over time. Therefore, it is more durable than black-coated items, such as black tungsten and titanium. This “black” or “oil slick” color is permanent, it does not fade, tarnish, or change color. Install: you can also request the scales to be installed on factory knife as a custom order. Just send me a message. Precision: each metonboss item is precision cnc machined from a solid billet in my anaheim manufacturing facility in california, usa. Even though most of them are in stock, some are only in machined form, so they still need to be finished to your order specifics – such as color treatment, patterns, etc. As there are thousands of variations you can select in my shop. If you need any item urgently, please ask me before ordering to be sure. Thank you and happy shopping, sean. We appreciate your support and love for metonboss edc products, including knife scales and hardware, lanyard beads, prybars, flashlights, pill boxes, haptic coins and fidgets, worry coins and spinning tops. This item is made of zirconium.