Need replacement bolts for your knuckle, but want a stronger bolt? This Samurai Super Metal Knuckle Bolt Kit is exactly what you are looking for. Our Super Metal Knuckle Bolts will replace your damaged, rusted, or missing Kingpin/Knuckle bolts. These bolts are 40% stronger than stock and exceed Class 12.9 strength requirements. In just a few minutes, you can have your bolts upgraded to make your rig more trail worthy.