While working on his handmade items, he is only shown using a crochet hook. Many of the finished items are clearly knitted, not crocheted.
While handcuffed, Mateo somehow changes out of his clothes into a prison jumpsuit. It would be impossible to remove/put on sleeves without taking off the handcuffs, yet presumably he neither a) had human assistance, since he spends most of his time after being arrested trying to contact and communicate with another human being, nor b) were the handcuffs remotely removed since when he gets to his jail cell he seems surprised when he is able to remove the handcuffs at all.