Black decker sightline variable speed jigsaw and kitbox black decker ks777k gb p the ks777k from black decker is a multi purpose jigsaw designed to fulfil a wide range of diy tasks involving wood metal or plastics the 520w motor delivers variable speed which improves the quality of cut the tool free universal blade clamp accepts both u and t shank blades p p the integral dust management system provides a dust blow feature and the sightline channel gives better views of the line of cut