We warranty this item to be no cost from defects in materials and workmanship ninety times in the date of order. Limits use. Inserts are produced from a non- galling bearing substance to avoid scratching of costly product. Delrin inserts will also be available for use with aluminum. A roll http://emiliokewoh.designertoblog.com/17909589/tube-pipe-bender-things-to-know-before-you-buy