Protect your Brooks style saddle from theft, fits horizontally bolted saddles. Unlike traditional locks, with Pinhead you can now protect specific components on your bike from theft. The unique Pinhead key system means that, unlike competitor locks of this type, they cannot be removed with a simple screwdriver. The Convex technology on Pinhead Brooks saddle locks protects them from removal by hammer, pliers, picks, universal socket tools, grinders and bolt cutters. Once installed, the saddle locks remain permanently on your bike, even when you ride. When you need to remove your saddle for adjustment, your Pinhead key lets you do this quickly and easily. Pinhead locks use a special coded key that comes with each lockset. The key is ergonomically engineered to install and tighten your locks. Each key is different, and comes engraved with a nine-digit code so it can be replaced if lost. With your key code, matching locks can be ordered to protect your other components or other bikes. Make sure to register your key code at pinheadlocks.com so that if you key is lost, a replacement key can be made for you. FEATURES: * Protection for: Your Brooks or horizontal bolt saddle * Replaces your existing lock nut * Easy, one-time installation * Lock nuts installed weight: 13g * Materials: Precision forged Cro-Mo steel * Online lost key replacement available for keys registered with Pinhead * Protected by a lifetime warranty PACK INCLUDES: * 1 x Lock Nut * 1 x Unique Pinhead Key