Ouch! keychain fidget, for ADHD, Autism as a pain seeking sensory, stim fidget. Relieves anxiety and stress for those people that seek pain. There are 5 Different strengths, each getting a little sharper. fits in the palm of your hand and squeeze, while they indent they won't cause any long term damage and used as an alternate option to self harm. of course this model isn't for everyone but as a family of neurodivergent people things like this can really help. 0.2 layer height, 15-20% infill depending if you like it a little heavier.