Pen spring DA OTF knife

thingiverse

This is the OTF knife made only with a pen spring. The DA OTF - Double action out the front design allows for the blade to be opened and retracted with a single switch. It's an automatic knife, which means it can be activated by a simple switch, making it highly accessible. However, it's essential to note that this type of knife is strictly regulated in many areas and prohibited for civilians to carry. Warning: do not attempt to carry this OTF knife outside your workshop.