Hollow Form HelperThis item ships directly from Lion Punch Forge and may ship separately from the rest of your order. Separate shipping charges may occur. Soldering round, curved, and hollow forms is a cinch with the Hollow Form Form Helper! This practical tool holds your metal pieces perfectly still while you solder, taking away the difficulty of keeping those intricate shapes in one place. No more struggle. Constructed from titanium to avoid issues with heat sinking.