Pre-tensioned door cylinder lock with AB key type, anti-theft protection, and a brass body. Key benefits Enhanced security: AB key anti-theft design reduces risk of unauthorized entry. Reliable fit and stability: pre-tensioned construction provides a consistent, secure fit in the door assembly. Flexible sizing: available in 65, 70, 80, 90, and 115 mm to accommodate a wide range of door thicknesses. Durable materials: solid brass body delivers long-lasting performance and corrosion resistance. Smooth, dependable operation: extended core and extended buttons improve key insertion, turning, and cycling. Features Lock type: pre-tensioned cylinder with AB key profile and anti-theft protection. Body material: brass for strength and corrosion resistance. Extended core and buttons: designed for easier key access and smoother operation. Sizes available: 65 mm, 70 mm, 80 mm, 90 mm, 115 mm. Color code: 85 32.5 52. Compatibility Designed to work with standard door lock assemblies that accept cylinder lengths 65–115 mm. Suitable for AB key systems commonly used in residential and light commercial doors. Compatible with typical mortise and rim lock housings that accept a pre-tensioned cylinder of the listed lengths. Use scenarios Home entry doors: replace or upgrade a worn cylinder to improve security and reliability for daily use. Small office doors: withstand frequent operation while maintaining smooth key action for staff. Storage rooms and utility doors: secure restricted areas with a durable brass cylinder and anti-theft key profile. Specifications summary Type: pre-tensioned cylinder lock Key profile: AB key (anti-theft) Body: brass Extended core and buttons: yes Lengths: 65, 70, 80, 90, 115 mm Color code: 85 32.5 52 Installation note Confirm the required cylinder length for your door assembly before ordering to ensure correct fit.