Double-ended contour sanding blocks for easy sanding of concave and convex shapes without distorting or diminishing profile. Ends are connected by a narrow flexible section for comfortable grip. Made from flexible rubber that adapts to minor variations in diameter. Grippy texture prevents sandpaper from slipping and hand fatigue. Set includes six blocks with inside/outside diameters of 6, 10, 13, 16, 19 and 22mm (1/4, 3/8, 1/2, 5/8, 3/4 and 7/8"). Diameters are moulded into the rubber for easy selection.