Product: Lock cylinder wrench (Schlosskörperschlüssel) with dual-spec design — includes both long and short handle options to work with a wide range of door locks and provide precise access during installation and adjustment. Why you need it: Ensures accurate positioning and secure fit of lock cylinders so installations finish correctly the first time. Prevents errors from incorrect sizing that can cause misaligned locks, loose fittings, or repeated adjustments. Key benefits: Dual-spec handles (long and short): Gives the reach and leverage needed for different lock depths and workspace constraints, improving versatility for both tight and open access points. Etched measurement scale: Clear, permanent markings on the tool allow precise adjustments during installation so you avoid mismatches in cylinder length or alignment that slow down professional jobs or DIY repairs. Durable stainless steel construction: Built to resist wear and corrosion, maintaining performance and appearance under frequent use and in harsh environments. Ergonomic grip: Designed to reduce hand fatigue during extended tasks, enabling steadier control for fine adjustments and faster, more reliable work. Function and compatibility: Designed specifically for use with standard lock cylinders and door lock assemblies; the long/short handle options adapt to different lock types, depths, and mounting positions. Measurement scale supports exact sizing and repeatable results for both new installations and retrofits. Performance: Reliable mechanical strength for torque and repeatable adjustments. Measurement etching resists wear so accuracy is preserved over time. Typical applications: 1. Professional locksmiths adjusting or fitting euro-profile and rim lock cylinders where precise cylinder projection and alignment are critical to proper operation. 2. Homeowners replacing or upgrading deadbolts and entry locks — use the short handle for confined spaces and the long handle for recessed or deep-set cylinders. 3. Building maintenance and security technicians performing quick service checks or retrofits across different door types in residential or commercial settings. What to expect: A single, rugged tool that improves accuracy, speeds up installations, and reduces rework by combining adjustable reach, an etched measurement guide, corrosion-resistant material, and an ergonomic grip for comfortable, controlled use.