The cast design of the X-20 iron provides game improvement technology in its perimeter weighting and expanded sweet spot. Counter to traditional thinking, this club provides almost as much feel as a forged club and, while designed to provide a straight trajectory, still allows the player to work the ball a little depending on need and ability.
The pitching wedge is 45 degrees, which is strong even by contemporary standards. The positive is that the ball flight with this lowered loft is more driving, allowing the club's sharp grooves to spin the ball to a stop on the green. But it leaves you a gap between your pitching and sand wedges. The Callaway approach wedge (about 52 to 54 degrees) could fill the gap quite well.
The X-20 irons come standard with a wide choice of shaft from extra stiff Project X steel rifles to much softer, graphite lightweight or senior shafts. The lightweight and easy flex is designed to provide extra yardage to slower-swinging players but also requires very smooth swing action to keep your club on plane throughout.
The X-20 is a very straight-hitting club. Even with the high loft of the pitching wedge, it requires significant effort to "work" the ball, making the straight shot the club's ironic "weakness." The best advice to X-20 players is to take dead aim at your target--typically the flag--and presume that's the more likely shot.
As a discontinued club, the X-20 is most often available at discount and online retailers and in remainder stock in pro shops. The Callaway pre-owned website offers excellent access to used clubs and sets at quite reasonable prices. Even if you've lost your pitching wedge and need to replace it, it's a good bet the Callaway pre-owned site will have one.