Adaptive mechanism: instantly switch between 45-degree mode and gypsum mode for laminated and wood substrates to maximize setup efficiency and retrofit speed. Grip: ergonomic handle with a textured surface to prevent slipping, ensure precise control, and minimize effort during gypsum installation projects. Deformation resistant: rugged, optimized design for heavy use across multiple environments, maintaining functionality and stability under demanding conditions. Agile spare: streamlined tools for express maintenance and easy part changes, including 10 spare heads to minimize downtime. 2-3 practical use scenarios - Drywall and gypsum board installation: switch to gypsum mode for fast, accurate cuts and fittings on plasterboard; then move to 45-degree mode for bevels and clean joints on laminated or wood surfaces. - Cabinetry and laminated panel work: use 45-degree mode for precise bevels and edge alignment on laminated panels, then switch to gypsum mode as needed for quick adjustments or repairs. - On-site maintenance and repairs: use the included 10 spare heads to accommodate different task requirements and perform rapid parts changes, reducing project downtime in workshops or on job sites.