K1/4-S The K1/4-S features an output shaft on each side of the gearbox which is fitted with a sprocket (21 teeth; for chain #35). 1 sprocket supplied with motor, additional sprocket options available. K1/4-RD The K1/4-RD has the same features that the K1/4-S but supplied with a 3 inch wide cable drum on the shaft instead of a sprocket. K1/4-GD The K1/4-GD is primarily used to operate curtains horizontally. The K1/4-GD will motorize its load through a grooved cable drum. There is a second output shaft which can be fitted with a sprocket or a 3 inch wide cable drum. K1/2-S The K1/2-S is designed to operate heavy masking vertically. The K1/2-S is fitted with a sprocket (21 teeth; for #35 chain). Equipped with one output shaft. K1/2-GD The K1/2-GD is used to operate heavy curtains or masking vertically. The K1/2-GD utilizes a 10” grooved cable drum.