【Quality material】Flux pen is made of reliable materials, no leaking and safe for protecting the flux, preventing you from touching the organic solvents. 【Practical】No clean soldering pen,Low solids content for practically no residue 【Precise application 】The flux pen that is specifically designed for rework of conventional and surface mount circuit board assemblies. 【Suitable size】The rosin pen measures about 13.9cm/ 5.47 inches in length 【Wide applications】: these soldering pens can be applied for laboratory, computer, home repairs and correcting small PCB board errors and through hole solder joints, electronics welding, etc., bringing a lot of convenience to your work and improving efficiency