Features: new and high quality printed parts and tight corners to install heat-set inserts without touching your iron and melting the plastic. Compact and lightweight, this Heat Insertion Tool Kit is easy to store and convenient to use. Made from high-quality brass, it is anticorrosive and has great heat conduction. Wide size ranges gives you lots of flexibility to choose the right insert for your 3D printing project. This tool set is made especially for inserting heat set inserts of 3D printing parts, each tip head matching the corresponding inserts perfectly, making it very easy to install the insert and more importantly you get a smooth and clean insert. Specifications: Material:Metal Plug:EU/US Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Heat Insert Nut