JUMBO SIZE ALLEN WRENCHES 16 PACK - Includes 16 Big Sizes in the following Jumbo Size Allen Wrench Set in the Following Sizes 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 7mm, 8mm, 9mm, 11mm, 12mm, 14mm, 15mm, and 17mm SOLID CARBON CONSTRUCTION - Our Hex Keys are Made from Industrial Strength Carbon Steel in a Black Oxide (SAE) Finish SIZE MARKING ON EACH WRENCH & CASE - Sizes are marked on each Hex Key for Easy Selection & Organization. EXTRA LARGE ALLEN WRENCHES ARE PERFECT FOR A VARIETY OF JOBS - Including Fixing Brake Calipurs, Transmissions, Oil and Gas Equipment, Tractors and Farm Equipment, Semi Truck Engines, and So Much More! Yellow Paw Guarantee - Customer Satisfaction Is Our Highest Priority. We've Spent Countless Hours Testing & Sourcing Our Products to Ensure They're of the Highest Quality. If At Any Point You're Unsatisfied With Our Product Please Contact Us For a Free Replacement. Jumbo Size Allen Wrench Set in the Following Sizes 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 7mm, 8mm, 9mm, 11mm, 12mm, 14mm, 15mm, and 17mm