This axle block kit features titanium captive adjustment bolts (10mm) and a steel backing plate designed to lock into the axle—so you’ll never need an Allen wrench to remove it. Just grab a 17mm wrench and you’re good to go. The captive bolt design keeps the axle blocks tight and precisely aligned, allowing smooth, accurate chain adjustments with zero play. One block remains secured in place during axle removal, making wheel swaps quicker and easier. Compatible with the OEM Talaria Sting axle and Warp 9 Sting Titanium axle.