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: 18-8 Stainless Steel Sheet Metal Screw, Plain Finish, Truss Head, Phillips Drive, Type AB, 1/4"-14 Thread Size, 1-3/4" Length (Pack of 10)
Product description: The plain finish 18-8 stainless steel sheet metal screw with truss head and Phillip drive has a Type AB point for forming threads in thin metals between 0.015" and 0.050" thick and resin impregnated plywood. The Type AB point has the conical tip of a Type A point with the finer spaced threads of a Type B point. The 18-8 stainless steel material provides strength and offers good corrosion resistance in many environments. The material may be slightly magnetic. The truss head has an extra-wide low-profile domed shape for applications with minimal clearance. The Phillips drive has an x-shaped slot that accepts a Phillips driver and is designed to allow the driver to slip out of the head to help prevent over-tightening and damage to the thread or fastener., Sheet metal screws, a type of self-tapping screw, have threads down the entire length of the shank for tapping and fastening thin material. The point style determines the type of material the screw can be used on, such as metal, wood, or plastic.These screws commonly have a sharp point that helps penetrate the material.
Product price: $5.23
Product brand: Small Parts
Target attributes: Type
Answer: attribute: type
value: sheet metal
source: product description
attribute: type
value: sheet metal
source: product title