Loosen the knob counterclockwise, release the module, and slide to adjust the Angle, Align the Angle engraving and turn the knob clockwise to lock the module. AUXILIARY TOOLS SOPHISTICATED AND FLEXIBLE AIDS - The builder disc rotates320°, Made of metal, and , the builder's disc is marked with analed lines for accurate alianment. Adjust the disc of the builder, glue the plate, accurately control the Angle, so that the transformation is more accurate. AUXILIARY GLUE BOARD CONSTRUCTION DISPENSING ASSISTANCE - Multi-functional Angle builder, made of metal material, and anti-, equipped with glue storage, point location, with separable Angle fixator, auxiliary rubber plate construction and production, beautiful and practical, so that the model operation more leisurely. According to different needs, can build a variety of angles, easy transformation, the builder disc can be used independently, convenient and practical., Weight: 1.17616616777 Pounds, Manufacturer: NONDK