As fly tiers, how concerned should we be about the lead hazards in the brass tying tools that we frequently handle such as bobbins, vises, hair packers, hair stackers, etc. As I look around the tying bench there are many tools that are made of this metal. As I understand it, brass usually contains varying amounts of lead. Does anyone know if it is a legitimate concern to our health or not? Thank you in advance for any replies.