Executing soldering jobs requires several soldering materials, such as solder wire, solder bars, solder paste and flux powders, and various aids, besides a host of equipment, such as soldering tip cleaners, vacuum grabbers, desoldering pumps and braids, and other auxiliary tools. Solder wire is generally a mix of tin and lead with a low melting point, that can be easily melted with a soldering iron. Solder bars are suited for electronic solder stations. Solder paste is a mix of solder spheres and flux, and is the type of solder used in PCB assembly. The paste turns sticky when heated, to fix components in place, and on being heated, melts further to forge a mechanical and electrical connection. Flux powders are for use on surfaces that are difficult to solder, such as copper, gold, silver and other base and ferrous metals. Soldering tip cleaners are used to remove the flux residue and keep the joints clean. Desoldering pumps are used to suction out the flux. Holding devices and frames help keep the soldering iron in place and render stability to soldering jobs. Some models have magnifiers to aid the process. The top aids required for the soldering process are surface-mount adhesives, flux dispensing pens, conductive and coating pens, tip retainers, flux removers, deionised water and more.