Losmandy put together this DM-12 Dovetail Plate Kit for large 12" aperture Meade OTAs to enable the use of their heavy-duty dovetail system. The two included blocks are designed to match the OTA's circumference curvature with mounting holes spaced to match standard Meade spacing. The blocks easily attach to the 19" long Universal Mounting Plate, which has numerous mounting holes that will correspond to most Meade scopes. This kit comes with all the screws required to mount the blocks onto the OTA and dovetail, with the correct Meade thread sizes.