These 'Jigs' are designed to assit in the accurate positioning of point motors lining up with the track perfectly. They are designed for code 100 track points. There are versions for DCC Concepts iP motors and also Tortoise motors. Please make sure you get the correct type.
They are available for Single points which work on left and right hand points, a version for three way points (NOT CODE 75) and a version for double slips.
There are printed instructions with photos in each pack showing you how to use the jigs.