LOCK N ROLL (SEAT POST) - Material: Aluminum. - Length: 35mm. - Type: Locking pin. - Security level : 3.5. - Anti theft : A special washer makes the unscrewing impossible even with a tool. - Tools free : Easy and quick mounting, no tool required. - Lock'n Roll is a locking pin patented and innovative. In the horizontal position, the quick release lever is automatically locked; to unlock it the bike has to be lifted-up to the vertical position. A special washer makes the unscrewing impossible even with a tool. - Weight : 40g.