This document provides instructions for building a bicycle hacksaw. The goals are for participants to learn basic tool use and welding skills. The project involves using a hacksaw, drill, files and other hand tools to cut and shape bicycle parts into a functional hacksaw frame. Key steps include cutting a bicycle handlebar to form the hacksaw body, attaching tensioning systems made from bicycle caliper arms, and drilling/welding everything together. With about 1.5 hours of work, participants will construct a working hacksaw they can take home while gaining practical workshop experience.