Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Powerful 19.2 Volt Drill / Driver with 1/2 Inch Key-less Chuck and Two Lithium-ion Batterys, Great for Both the Professional Contractor and Home Handy Man - Even Includes a Tough Carry Bag
Product description: C3 19.2V Drill/Driver with 2 Batteries, Charger and Soft Bag Get your job done fast and efficiently with this C3 1/2-inch Cordless Drill Kit. The C3 Cordless Drill Kit comes equipped with: A powerful motor that produces up to 300 in-lbs of torque to handle most of your drilling and driving needs 2-speed gear box for either high torque or high speed applications: 0-350 and 0-1300 RPM no load 21-position adjustable torque clutch which allows the bit to stop at various torque settings to avoid over driving screws 1/2-inch single-sleeve, keyless chuck to hand tighten bits securely without a key Integrated LED light for work in low light Electric brake to quickly stop the bit rotation Kit comes with C3 1/2-inch drill/driver, 2 batteries, multi chemistry charger and soft bag.
Product feature: Model #91347
Product brand: Craftsman
Target attributes: Chuck Size
Answer: attribute: chuck size
value: 1/2-inch drill
source: product description
attribute: chuck size
value: 1/2 inch
source: product title
attribute: chuck size
value: 1/2-inch
source: product description