Features: Allows you to reach deep into 3D printed parts and tight corners to install heat-set inserts without touching your iron and melting the plastic. This Heat Insertion Tool Kit is easy to store and convenient to use. Selected from brass, it is anticorrosive and have great heat conduct. Wide size ranges gives you lots of flexibility to choose the right insert for your 3D printing project. This tool set is especially for inserting heat set inserts of 3D printing parts, each tip head matching the corresponding inserts perfectly Specifications: Component:Brass Size:Approx.26mm/1.02inch Package Includes: 1 Set Heat Insert Nut note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.