Keychain Pen

This is a pen that you always carry with you, so you can use it at any time without fear of losing it, since it goes with your keys.

It is composed of two parts, the main part, a BIC pen, which must be cut to measure 40mm of ink (Use one that we have used and has little ink left), and the secondary part, which is the screw-on cap, which has a hole to put it on our keychain.

This keychain is useful because you carry a pen with you, something very used today.