Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Dasco Pro 420 Long Cold Chisel, 1-Inch
Product description: Dasco Pro long cold chisels are precision ground for cutting, shaping and removing metal that is softer than the cutting edge of the chisel. Made of high carbon steel that has been heat treated, these chisels are to be used on cast iron, wrought iron, steel, bronze and copper. Dasco Pro, Inc. offers a broad range of forged hand tools used for carpentry, masonry, and demolition. Our 89 year legacy brand incorporates time tested design, superior materials, and distinguishing technology. Construction professionals, home improvement enthusiasts and hobbyists alike ask for Dasco Pro striking tools because quality tools equal quality work.
Product feature: 18-Inch long, Made of high carbon steel that has been heat treated, Precision ground for cutting, shaping and removing metal that is softer than the cutting edge of the chisel, To be used on cast iron, wrought iron, steel, bronze and copper, Designed and manufactured in the USA
Product brand: Dasco Pro
Target attributes: Type
Answer: attribute: type
value: None
source: None