Folding Scalpel

Update:
changed the Top of handle and the 2 holders to have a better Locking ability.
It's not perfect, but it works better.
you will probably need to slowly file down the Male Locking Nib until you get a good sliding fit that locks.
It was a quick fix really.

Fits blades for #3 handle, and #4 handle.
requires:
2 x M3 Counter Sink screws 12mm long
2 x M3 nuts

I bought my blades from Amazon:
Large variety set:
https://www.amazon.com/gp/product/B078Q2QRDX/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Number 12 Blades with #3 handle:
https://www.amazon.com/gp/product/B00OTKSUN6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

BE SUPER CAREFUL... THESE ARE SHARP

Material: PETG or PLA
Layer Height: 0.15
No Supports needed
The 3mf file has temperature for PETG, but everything else works good for small details. just change the Temp if your using PLA