Attachable 4" & 7" dials have larger numbers for easier reading and larger diameters for greater accuracy. The attachable dials are great when using the True Angle® Tool as a layout tool for sketching, drafting, angle transfer, pattern design, etc.
Note: The attachable accessory dials are not normally used on the smaller True Angle® tools when measuring inside and outside corners for crown molding and trim. Use of the dials on the tools for crown molding and trim requires spacer blocks to hold the tool blades parallel to the wall. This is common practice with the 36” and larger True Angle® tools and a must for the 72” and 96” tools when installing items such as cabinets.