Angle range and steps: The ruler is adjustable from 0 deg to 70 deg, in 5 deg increments, with fixed positions at 22.5 deg and 67.5 deg. Any required angle within this range can be obtained by moving and rotating the ruler. Locking mechanism: A steel ball locks the selected angle firmly to keep lines steady during painting. Precise and reliable: The combination of adjustable angles and the locking ball provides repeatable, accurate angle guidance for clean, crisp paint lines. Portable and easy to use: The ruler is designed for simple handling, allowing quick setup and secure holding while you work. Function and performance: Designed to support painting and layout tasks that require precise angled guides, ensuring stable alignment and minimal deviation during strokes. Compatibility and applications: Suitable for painting projects, drafting and design layouts, and DIY or craft work that requires accurate angle references. Ideal for wall borders, canvases, murals, stencils, frames, and pattern guides. Use scenarios: 1) Painting crisp border lines and edge guides on walls or canvases by aligning the ruler to the desired angle and locking it in place. 2) Creating layout guides for murals or decorative patterns in art projects, ensuring consistent angle repetition across the design. 3) Marking and transferring angled cuts or guides in DIY tasks such as framing, tiling, or woodworking, where precise angles are required.