The Silver Bullet by Tom Kuhn is a yo-yo first released in 1984. It was the first-ever yo-yo to feature a full-metal body, which is machined out of aircraft-grade aluminum. It was also named for the bullet-shaped axle hubs that it had on its sides. It also boasts a replaceable wooden axle sleeve in the vein of yo-yos like the No Jive 3-in-1 and the ProYo. There was also a rare anodized version, of which only fifty were produced. Instead of bare polished aluminum, the yo-yo is clear anodized giving it a dull metallic color (see photo links below).