Xacto Thumb Thimble

For cleaning up parts post-printing with an X-acto knife I often am holding the handle in my four fingers and using my thumb to push the part against the blade, this allows for finer control when cleaning (i.e., cleaning brims) and usually I can control it enough that the blade never hits my thumb, but sometimes the blade is too dull to cut cleanly through and jerks or the part slips so I designed a thumb thimble as extra protection.

This is sized to my thumb so may need to be scaled for you