credit to this site http://teamurbansiege.com/image-galleries/quick-release-trigger.html and who gave them the plans

this is not my design, all i did was make a cad .stl to use on 3d printer 3hr work to upload it from there .pdf plans to .stl have fun using it.

i made this a stl so i could print out templates and cut it from 1/4" steel {6mm} i plan on welding an axe to steel counter wight - to drop on to wood to split it in 1 go.

print two of the back and front plate fixing bolts are 7mm shackle in quick-release 8mm fits best 13mm hole safety pin 7mm leaver rope attachment 4mm 140mm wide 71mm high top trigger
https://youtu.be/OXzSF4gbbnA