Secure your seat and accessories when you lock up with the Kryptonite KryptoFlex 525 Looped Cable. Designed to pair with a Kryptonite U-lock, disc lock, or padlock, the 2. 5-foot cable can thread through your saddle rails, helmet, or other small accessories to keep them secure when you're running errands or heading into work for the day. Its 5-millimeter cable provides some cut resistance, but isn't heavy duty, so we recommend sticking to the smaller components and accessories instead of locking up a pricey bike with this compact cable. If you're looking for bigger security, pairing the KryptoFlex 525 looped cable with a larger U-lock for your frame, like the KryptoLok U-lock, will offer you solid frame security with the added bonus of knowing your quick-release seatpost and saddle will still be there when you get back.