This ratcheting screwdriver only needs 4 screws and one nut. For the spring you need 1 M3 x 20 (or 18 mine stuck out a bit with the 20) and 1 M3 x 12. For the plate screws you need 1 M3 x 12 and around a M3 x 6. for the spring I used a random spring I found but I put the dimensions in one of the picture.
The author marked this model as their own original creation.