Check the listing for details. Ruger 10/22 Bolt Handle Installation Tool | 3D Printed | Black. Color: Black, Condition: New, Made in United States. Listed at 8.99 USD. Stop fighting your 10/22 bolt knob with a vise and a prayer. This dedicated install tool seats aftermarket charging handles cleanly and evenly, protecting both the bolt and your knob's finish during installation. Every item proudly made in the United States of America. This item is designed for easy install of the spring and bolt of a Ruger 10/22. It does not relate to the firing or operation of any firearms. Please ensure your equipment is safe and unloaded before doing any maintenance. Please make sure you comply with all local restrictions when choosing equipment and firearms for your purpose. This design was created by "Smeacole" on Printables. Used under a Creative Commons + Attribution License.