Remington SP-29 Replacement Cutters and Heads. Restore your shaver to peak performance with this 360° Pivot & Flex Replacement Head. Featuring all the technological advancements of our shavers, the replacement has full floating heads, dual-track cutters and long-lasting, titanium-coated blades which combine to improve glide across your skin and create an exceptionally close shave. The one-piece, click-in design makes replacing the head a snap. Thanks to the clever open design, debris falls away from cutters and makes for easier cleaning. Cutters & Heads for R-450S, R-460D, & R-650S.