However, sand wedges generally have not received this same reduction in loft, even as they were designed with similar weight-distribution and backspin-improving features. This is because the sand wedge is typically not used with distance in mind; its eponymous purpose requires the traditional 54-56° loft angle in order to dig into the soft sand surrounding the ball and lift it out. The sand wedge's nominal loft and "bounce" angles have not changed appreciably from Gene Sarazen's original concept based on the niblick. Cavity-backed, perimeter-weighted sets may de-loft this club by a degree or two compared to a forged set, but this is nowhere near the amount of loft reduction seen in the numbered irons. This leaves a "gap" in loft angle between the pitching and sand wedges of up to 10 degrees, causing a distance difference with a full swing of up to 30 yards, both of which are differences normally seen between irons two or more loft numbers apart (e.g., between a 7 and 9 iron) instead of "adjacent" lofts as the PW and SW traditionally are.