Dual measurement system - The woodworking ruler provides metric/mm and imperial/inch readings and is available in three lengths: 6in/160mm, 8in/210mm, and 12in/300mm. A set includes all three ranges for flexible use. Clear scale visibility - Metal tool kit options come in red or black with white scales for high contrast. The white text on red or black backgrounds ensures quick, easy reading. Scales and base colors are printed with a durable process that resists fading through heavy use. Slide rule with stop - The ruler features a precise slide rule and a thin groove at the end for immediate layout. Set the stop, place a pencil in the groove, and lock the stop securely with two thumbscrews. Material and durability - Made from precision machined aluminum alloy for accuracy, corrosion resistance, rustproofing, hardness, and long life. Practical applications - Marking accurate cut lines on wood, transferring measurements from templates to parts, and laying out cabinetry and furniture components with confidence. Compatible with standard pencils and marking tools for everyday woodworking.