Check the listing for details. Custom Lead Alloy for fixing casting issues!!. Condition: New other (see details). Listed at 54.50 USD. When casting from unknown scrap sources the caster may run into problems with his alloy. If the pour fails to fill out the mold completely and has a wrinkled look in areas the addition of tin will fix this issue. This applies to the DIY caster making anything from jigs and sinkers to parts with great detail. To shoot well your casting may need a minimum hardness to avoid striping against the rifling and increased hardness from tin may help but especially adding antimony can change a melt into a good shooter. Higher velocity rifle applications do better when increasing the antimony to greatly increase the hardness. The presence of arsenic will harden the surface area of a casting when quenched in cool water. As long as your casting contains some arsenic it may be baked in an oven and quenched to make it harder as well. This metal alloy is the answer!. The alloy is high in tin, antimony, and has some arsenic. When melting your unknown scrap, cast and determine it's properties. If it needs tin to fill out just add a few nibs of this fixer alloy. A few will increase hardness too. For a higher velocity you may add more. If quenching to again surface hardness you would only need one or two fixer nibs. This alloy has been extruded and cut into easy to use nibs. Extruding work softens the allow and when cast it is even harder. The listing includes 15 pounds of fixer nibs that will fix or greatly improve many pounds of lead scrap. (Potentially several hundred pounds. Depending upon the purity of the lead you are starting with.) Scrap metal is low cost alloy but it often is lacking in one area or another. Don't settle on less than perfect. This investment will allow you to use just about any low cost scrap lead . On another note DO NOT USE LEAD FROM BATTERIES. This metal includes contaminants that will put off a toxic fume. All other lead alloy is safe to melt out doors with natural air flow. Listing is for 15 pounds shipped FREE via Priority mail service! This is a cheap price based upon the current retail price of tin etc. Save money and shoot well. Some feedback on this item: "... accuracy was very poor. The fixer lead you supplied did increased the surface hardness enough to make them work." "This alloy stopped my issues with a wrinkled surface. The lead I had was pure and I wanted to keep it as soft as possible, we only had to add a few nibs to get the wrinkles to disappear." "works great fixing fenders on a car I am restoring the old school way." "adding your lead and a gas check we are pushing our cast ,,,, much faster with good groups."