Wheels and seats are some of the most expensive components on your bicycle. The Seatylock X Lock System secures the wheels and seatpost from theft with a proprietary tool interface to ensure your wheels and seat post remain secure. Below variants available and include: A: Fits PRIORITY CONTINUUM ONYX** (pre X lock variants produced before H2 2024) and PRIORITY TURI Front Axle Nut - 3/8 x 26 Rear Axle Nut - M10 Seatpost 31.8 Clamp Proprietary X-lock socket Key B: Fits PRIORITY 600 Front Axle Skewer - 9x100mm QR, 125mm OAL Rear Axle Skewer - 10x135mm QR, 168mm OAL No seat post clamp included Proprietary X-lock socket Key C: Fits PRIORITY Classic models, 3/7 speed Coasts, Brilliant Cooper/Carmen, V-brake L-Train, Ace, and Folder, Sauce Front Axle Nut - 3/8 x 26 Rear Axle Nut - 3/8 x 26 No seat post clamp included Proprietary X-lock socket Key D: Seatpost Clamp - Fits all Priority, Brilliant, and Xtracycle models Adapters for 28.6, 30.0, 31.8 and 35.0 mm sized seat tubes Proprietary X-lock socket Key * Note, one (1) locking axle nut on all solid axle variants included per wheel. ** Note, current production Continuum Onyx come standard with X locks. Only for older production Continuum Onyx and Turi retrofits.