Joint finger 0 mm for removing uncured fresh silicone Joint finger 2-6 mm for all standard joints with low movement, e.g. windows or mirrors Joint finger 8-10 mm for all standard and extension joints, like bathtubs, kitchen plates, ceramic tiles, floor-wall joints Joint finger 14-20 mm for big and wide extension joints: ceramic tiles, floor-wall Joints, masonry joints etc. Joint finger rounded part for extension joints where a round bead is required