You will need, 2x M3x8mm hex screws and nuts and obviously a blade : https://amzn.eu/d/7WZzC8f

Print eveything upside down. PLA should be fine but PETG etc recommended @ 0.2 layer height max.

Apply the tiniest drop of oil to the slide rail sides before use.

Safety Features include retractable function, also includes little built-in catch for reassuring deployment and retraction.