Titanium Quick Release 1/4 turn Fasteners. Allen Key Head 17mm length. These Fasteners are great for all you racers out there, quick, easy to use and super strong! With a beautifully machined scalloped head and polished to a smooth finish these wont rust! Length is measured from under the head to the tip of the end. 17mm is our most popular size and suits many styles of fairings. Anti-scratch washers, and steel 'grippa' washers included. Pack x 10