Abstract: A first and second die each have a plurality of flat side faces and a pair of flat end faces. Unique marking are provided on each face. A connector releasably interconnects the first and second dies. Relative rotation between the first and second dies increases the number of combinations of pair groupings or markings that may be provided by the side faces when the dice is rolled. In a second embodiment, a hollow die has a plurality of faces and a cut-out is formed in each face, producing a flat part for each cut-out. Each flat part is press-fittable into its associated cut-out and has two sides each of which bears a preselected marking. Each flat part is removably mounted within its associated cut-out so that either the first or second marking is displayed when the flat part is positioned within its cut-out.

Abstract: A writing surface, such as they be used for white board, is produced by vapor deposition of a thin ceramic film on a substrate.

Abstract: A frame assembly comprises a rigid inner frame having a first perimeter; a plurality of independent outer frame members positioned outwardly of the inner frame to define a second perimeter larger than the first perimeter, the second perimeter defining a plane having a front face and a rear face; and a flexible sheet extending across the front face, around the outer frame members and secured in a fixed position on the rear face to define a plurality of longitudinally extending passageways adjacent the second perimeter, the outer frame members positioned in the passageways.

Abstract: A compact, hand-held tool for safely deburring the edges of a skate blade. The tool utilizes a pair of resiliently biased deburring surfaces which are movable between an open position and a closed position. The deburring surfaces are resiliently biased in the open position by a biasing means such as a leaf spring. In the open position, any size or shape skate blade can be readily inserted between the deburring surfaces. A user can apply pressure between his/her thumb and fingers to engage the deburring surfaces against the skate blade edges. The width of the skate blade determines the extent of the closed position. In the closed position the tool can be manipulated back and forth along the length of the skate blade to simultaneously deburr both edges.