TinkersConstruct/tconstruct/library/util/IToolPart.java

package tconstruct.library.util;

import net.minecraft.item.ItemStack;

public interface IToolPart
{
    /** Parts to build tools from. ex: Pickaxe Head
     * 
     * @param stack This item
     * @return Proper material ID. -1 for invalid
     */
    public int getMaterialID (ItemStack stack);
}