1.CONSTRUCTION: Made of aluminum alloy with anodized surface to ensure durability and resistance to wear and tear; lightweight design for easy handling; provides excellent stability to ensure precise measurements and cuts; able to cope with a wide range of demanding conditions; suitable for professional and DIY woodworkers. 2.DESIGN: Stair gauge frame jig features a hexagonal flat design that is better suited for edges rather than rounded surfaces; higher construction ensures complete perpendicularity to the material; ensures stable and precise clamping of the work piece; ideal for achieving precise angle cuts; helps maintain consistency and alignment of the project. 3.ANTISLIP SCREWS: Comes with black oxidized steel screws for enhanced grip; Avoids slipping when in use; Easy to tighten even when wearing gloves; Ensures that the framing jig is securely fastened; Provides extra stability for a wide range of materials. 4.VERSATILE FRAME SQUARE ACCESSORY: Aluminum Stair Gauge is designed for circular saws for accurately marking staircase curved feet; facilitates marking repetitive angle cuts; compatible with most framing and carpentry squares; provides precise guidance for the saw to ensure clean and consistent angle cuts; simplifies complex framing tasks.