NOTE: Plastic packaging is yellowing. See pictures. The Craftsman 9-39749 Do-It-Yourself Home Improvement Project Calculator is a versatile handheld calculator suitable for various projects. With basic, printing, financial, and scientific capabilities, this calculator helps users quickly solve problems and make informed decisions. Powered by batteries, it offers convenience and portability for DIY enthusiasts and professionals alike. The regular display size and key size make it easy to use for a wide range of tasks related to home improvement projects.