Srixon I-506 Irons. As used by Jim Furyk. New for 2006, the Srixon I-506 Irons are forged blades aimed at lower handicappers. The Srixon I-506 irons combine accuracy, great distance, and feel with Srixon's 'Digital Impact Technology' to unite science, performance, and style. These forged irons, which feature Srixon's tour cavity back design, are made from a soft 1025 mild carbon steel and feature a new round radius sole with heel and toe cuts which allow the club to glide easily through all turf conditions. It has a classic blade profile with a thin top-line and minimal offset, giving it the appearance of a traditional player's club.