Meat Tenderiser Attachment for Amazon Basics Hammer

This model has a choice of two faces for a meat tenderiser attachment for the largest hammer (1kg) in the Amazon Basics Hammer set. 

The hammer attachment should be printed with the 8 locator fiducials face-down, with support material to support the remaining pieces of the lower face. After printing, the tenderiser face and the hammer attachment must be glued together. 

The magnets used were these, but I was shipped 20 x 10 x 3mm, not 2mm as it states in the product listing. The actual measured dimensions of the magnets I have are 19.65mm x 9.6mm x 2.85mm.