TB Wood’s light-duty sheaves are available in two types, both with one and two grooves. "AK" sheaves are made to accommodate A (4L) belts; "BK" sheaves are made for A (4L) or B (5L) belts. The two lines of sheaves have identical pitch diameters when using A or 4L belts. Wood’s light-duty sheaves can be equipped with Wood’s "QT" Sure-Grip QD-type bushings, quick-detachable tapered bushings that are split through flange and tapered surface to provide a true clamp that is comparable to a shrink fit.