Abstract Non-suicidal self-harm has been increasing in young people over the last decade leading to several self-help interventions being developed. Self-help toolkits are given a variety of names, such as ‘hope box’ and ‘self-soothe kit’, but all seek to provide young people with the tools to manage thoughts to self-harm by bringing together a collection of personal items, distress tolerance activities and help-seeking prompts. They represent a low-cost, low-burden and accessible intervention.