Printing instructions:Print using 0.4mm nozzle or smaller. After printing use fine file to shape a nice edge on both hooks of the tool and to deburr other edges if needed.Tool usage:To pull the keycap with this tool simply push the tool over regular keycap until the hooks snap over both edges of the keycap and then pull straight up.Note: Some keyboard switches and keycap combinations are very hard to pull (such as Cherry MX clears and Signature plastics DSA keycaps). Please use caution when pulling so you don't damage either keycap or key switch.