Universal door-type insert: Works reliably with swinging doors, sliding doors and double-leaf doors, with an adjustable spring force for even pressure distribution that ensures consistent latch alignment. Modern mounting technique: Protects door and fittings, simplifies installation challenges, minimizes wear in operation, and boosts overall efficiency with time-saving separation features during mounting work. Precise borehole positioning: Accurate strike plate placement for stable alignment, reduces manual measurement errors through exact guidance when mortising, and ensures reliable mounting accuracy for door lock installations. Multifunctional tool: Integrated groove milling and positioning functions in a compact housing, reducing installation steps for door locks through a well-designed tool combination. Applications: - New build or renovation projects with multiple door types (swing, slide, double-leaf) where uniform pressure and precise alignment are critical. - Locksmith or carpentry installations requiring efficient mounting and accurate boreholes in door frames. - Jobs that benefit from a single compact tool offering groove milling and positioning to streamline door lock installations.