Key benefits Smooth, reliable operation: the cylinder provides even, jam-free key rotation so locks open and close easily every time. Enhanced security without extra hardware: anti-pick, anti-drill and anti-bump protection improves resistance to common break-in techniques without requiring handle or accessory upgrades. Bump-key protection with a safer design: a unique anti-bump mechanism that does not use trap pins blocks access to impact (bump) keys while keeping turning action smooth. Flexible fit: available in different sizes and in both double and button (thumbturn) cylinder styles to match a wide range of installation needs. What this product does for you Prevents forced entry techniques (picking, drilling, bumping) to reduce theft risk and give you greater peace of mind. Maintains easy daily use — no stiff or jammed key action — so family members and guests can operate locks without difficulty. Fits most common doors so you can upgrade security without changing the door hardware layout. Key features Material and finish: nickel cylinder, durable and suitable for regular use. Security features: anti-pick, anti-drill and anti-bump protection; unique anti-bump design that does not rely on trap pins. Operation: even, smooth rotation of the cylinder; blocks access to impact/bump keys. Options: available in multiple sizes; choose double cylinder or button (thumbturn) cylinder according to your installation preference. Compatibility: suitable for wooden doors, composite doors, metal doors, interior doors, front doors, patio doors, French doors and most doors with a keyhole. Performance and installation notes Designed for straightforward replacement or upgrade of existing cylinders — improves security without costly handle changes. Available in sizes to match standard euro-profile or similar cylinder housings (select the size and type that fits your door). Nickel finish resists wear and fits a variety of door styles. Practical use scenarios Residential front door: Replace an old cylinder with the nickel anti-bump, anti-pick cylinder to strengthen entry-point security while keeping easy key operation for family members. Patio or French doors: Upgrade sliding or double doors where conventional locks are vulnerable to bumping or picking; the cylinder’s smooth rotation prevents jamming during frequent use. Apartment or office interior doors with keyholes: Choose a double or button cylinder size that fits the existing cutout to add drill and pick resistance without modifying the door hardware. Customer support If you have any problems or questions about fit, function or installation, contact us and we will respond within 24 hours to help resolve the issue. Choose this cylinder when you want a durable nickel lock core that fits most doors, provides anti-pick/anti-drill/anti-bump protection (with a non-trap-pin anti-bump design), and delivers smooth, jam-free key operation in double or button cylinder configurations.