These jig heads are a bismuth majority alloy that makes them sink just as quickly as a lead jig without the cost to the environment when they are lost. We use Mustad Aberdeen hooks in sizes #1 or #1/0 for the 1/4th oz., #1 or #2 for the 1/8th oz. (3.5g), #4 for the 1/16th oz. (1.75g) and #6 for the 1/32nd oz. (.875g) POWDER PAINTING: Bismuth jig heads can be powder painted. This alloy has a lower melt point than lead so if you are using a high heat source such as a propane torch adjust your heat exposure accordingly as they will heat up more quickly. A hot air gun is the preferred source of heat when powder coating jig heads whether lead or bismuth alloy. However, a butane lighter or candle can also be used successfully. Cure bismuth alloy heads at a slightly lower temperature (325F) for 20 minutes.