This 2 in 1 knapping tool provides you with the basics you need. It's compact size allows you to take it hiking or camping without taking your whole knapping kit. The over all length is 4 1/2", allowing for easy stowing. One end is boasting a 7/8" solid copper head, while the other a copper pressure flaking tip. The innovative twist lock design allows you to stow the copper nail while doing percussion work and deploy the nail for pressure flaking without the use of Allen keys. Recommended for light percussion, not designed for large spalls or spalling.