Setting blocks allow quick, precise height settings for fences, blades and other tools, faster and more accurate than using a combination ruler. Combination scales can be set for over 100 measurements. Stack the setting blocks for multiple sizes or use them individually for quick work and measurements. Setting blocks are all 3 inches long. Accurate block sizes include: 1/16', 3/32', 1/8', 5/32', 3/16', 7/32', 1/4', 5/16', 3/8', 7/16', 15/32', 1/2', 23/32', 3/4', 1x2x3. Easy to read etched labels on each piece. Comes with a box for protection of the combination cube during . Common applications: Set fence heights on table saws, router tables, and other cutting tools with repeatable accuracy. Create and verify precise spacers and thicknesses for cabinetry, shelving, and metalworking parts. Quick crosschecks and dimensioning on prototypes or during repairs where consistent measurements are required.