Basic kit to teach how to solder. Everything you need to get started and soldering and electronics. Make a fun electronics project while you learn the basics of soldering. Inside you'll find a 25 soldering iron, plus the tools and components you'll need to make a working mini electronic piano. UL listed -- UL has tested representative samples of this product and determined that it meets UL's requirements. This kit contains over 32 pieces, including: 25W soldering iron with an ergonomic-cool comfort grip (Catalog No. 6402070). Rosin-core solder (60% tin, 40% lead). Mini diagonal wire cutters. Piano project kit - PCB with components. Safety stand. Replacement Tip (Catalog No. 6402073) How to solder Thoroughly clean parts to be soldered. Use solder sparingly. Excess can spread to other connections and cause a short circuit. Tin the tip by plugging and the iron and letting it heat fully (about three minutes). Rub solder on all its tapered surfaces until the tip is completely coated. Wipe off excess solder with a soft, moist cloth or sponge (or you can use a tip tinner / cleaner compound such as catalog no. 6400020) Before soldering, tin the wire by heating it and letting a small amount of solder flow onto it. Apply the tapered surface of the tip (not its point) to the joint to be soldered. Then apply solder to the heated joint. Do not let the solder flow onto the joint by melting the solder on the tip of the iron.