Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Quick-Grip 5906ADV 6-Inch Advantage Power Clamp
Product description: QUICK GRIP ADVANTAGE 6 1/EA, They aren't called Quick-Grip Power Clamps for nothing. These clamps feature one-hand operation with a pistol grip advance action and quick release trigger. Clamping your project has never been so easy. With a swivel head and serrated jaw, they quickly secure different shapes and configurations; easily clamping multiple surfaces with over 600 pounds of force. The twin start screw allows you to make fine adjustments while the non-marring removable pads provide protection when working with delicate workpieces. The jaws, metal body, and serrated bar are heat-treated for strength, and coated with black oxide for rust resistance.
Product feature: One-hand operation with a pistol grip advance and quick release trigger, Swivel head and serrated jaw, Easily clamps multiple surfaces with over 600 pounds of force, Non-marking removable pads
Product brand: Irwin Tools
Target attributes: Type
Answer: attribute: type
value: clamps
source: product feature
attribute: type
value: clamp
source: product title
attribute: type
value: clamps
source: product description