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: Locking C-Clamp, 6 In Size, 2 1/8 In Cap
Product description: The Irwin Tools 18-6SP Original 6" / 150 mm Locking Clamp with Swivel Pads 6", with a jaw adjustment range up to 2 1/8" and throat depth of 1 1/2" Quick, easy locking and release action Leveling swivel pads protect delicate material Guarded release helps keep work fast and safe Full lifetime warranty WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Product feature: Wide opening jaw means clamping for a variety of shapes, Swivel pads great for delicate and awkward jobs with no damage to the work surface, Stays adjusted for using repeatedly, Guarded release trigger unlocks quickly and protects from accidental release
Product brand: IRWIN
Target attributes: Type
Answer: attribute: type
value: clamp
source: product title
attribute: type
value: clamp
source: product description