Features 1、Easy to Install: It can be removed and replaced from bike frame in a short time and is easy to install without the use of tools. 2、Manufacturing Material: Bicycle wheel group quick disassembly bar is made of metal material, high temperature and wear resistant, durable, suitable for most bicycles, including mountain bikes, road bikes. 3、Wide Applicability: 145mm / 5.7in front quick release lever, 185mm / 7.3in rear quick release lever, suitable for all common parts of front and rear bicycle wheels with hollow shafts. 4、Quick Release Design: Quick release design which allows you to adjust your bike seat height quickly and easily. Easy operation, no tedious steps. 5、Simple Operation: Simple to operate, easy to use, easy to install and disassemble. Without any difficult requirements even though you use it for the first time. Specification Item Type: Bicycle Wheel Hub Skewers Weight: Approx.94g / 3.3oz Material: Metal Product Application: Front Quick Disassembly Rod Length: Approx.145mm / 5.7in Suitable For Front Fork Opening: Approx.100mm / 3.9in Rear Quick Disassembly Rod Length: Approx.185mm / 7.3in Suitable For Rear Bike Frame Opening: Approx.135mm / 5.3in Package List 2 x Quick Release Lever