paper shredder

I made a paper shredder. It can cut up to 5mm.
It has two versions.
(A4 version use for cutting paper: width ≤210mm , A5 version use for width ≤150mm ）
A4 version is apply to printer bed ≥250 mm
A5 version is apply to printer bed ≥180 mm

Installation instruction is shown in the picture.

special tips:
you need a wallpaper blade, and break off two parts with plier (see picture. ) after inserting blade.( Be careful your hand)

The blade must be sharp,and blade point stay out.

This model was printed using PLA. (fill in 10%，using a lower layer hight 0.2mm，no support)