Yankee Reamer warrants to original equipment manufacturers, distributors, industrial and commercial users of its products that each new product which it manufactures or supplies is free from defects in material and craftsmanship. Yankee’s sole obligation under this warranty is limited to furnishing, without additional charge, a replacement for, or at its option, repairing or issuing credit for such product which shall, within 30 days from date of sale by Yankee, be returned freight prepaid to the plant and which, upon inspection, is determined by Yankee to be defective in materials or workmanship. The provisions of this warranty shall not apply to any product which has been subjected to misuse, improper operating conditions, machine setup or which has been repaired or altered, other than at Yankee.