[A wide range of sizes to choose from]: There are 6pcs heat set insert Soldering tips for heat-set inserts M2 M2.5 M3 M4 M5 M6,Wide size range gives you lots of flexibility to choose the right insert for your 3D printing. [Designed for 3D heat-set inserts installing]: This tool set is made especially for inserting heat-set inserts of 3D printing parts,each tip head matches the corresponding inserts perfectly,make it very easy to install the insert and more importantly you get a smooth and clean insert. [Made of high quality brass]: This tool set is made of high quality brass,it is anticorrosive and has great heat conduction. [Work Better]: Installation tip works better than soldering iron tip since conical tips can catch on the insert and accidentally pull the insert out while melting the plastic and ruining the part. [Wide compatibility]: Using integrated design, the structure is stronger and integrated design, the components have stronger stress-bearing capacity. Suitable for 936 soldering iron tip Colour:Yellow Material:brass Package Contents: 1 * Nut Iron Tip Heat Set(6PCS) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.