Black & Decker Fitting. A chrome vanadium blade with downward cutting teeth which are ground & sharpened. The downward cutting prevents splintering of laminated worktops. Can be used on thickness of up to 30mm. 10TPI. Overall Length 3. 5 / 8in (91. 5mm). Pack of 2. Applications: 1. Wood 3. Plywood 4. Laminated Chipboard.