This was made for a class project at Bellingham Technical College. It is self ratcheting and can be disassembled using a quarter.
20% for spring and rod, 10-15% for body
If you are having trouble printing the spring due to the bridging let me know and I will design a solution.
The spring should be printed out of ABS but PLA will work for a short time. The body and rod can be printed out of PLA.
Do not print any support structure for the spring! Delete all support structure for the text of the body it is not necessary.