X-acto knife copy from a utility knife's blade

thingiverse

This is a simple knife that uses blades from a utility knife. The design is a remix of the X-Actamundo Hobby Knife: http://www.thingiverse.com/thing:17551 Some dimensions are modified to fit standard blades from a utility knife and the shape of the slot for the blades is corrected to face the right direction. You will need to cut off some blades from a utility knife and secure them in place with the lid, and an M3 screw and nut. If the first blade becomes dull, do the same as with a regular utility knife and snip it off, then adjust the lid and move the next blade to the front.