Muddy Quick Step XL Black. Muddy brings you the Quick Step XL Runners that allow you to safely climb large trees while maintaining your secure grip. These Runners come in two different sizes XL and XXL and are designed for very large game. The Quick Step XL uses a system of cams to hold the steps in place and aluminum bark biters to hold the steps to the tree. Muddy makes a big heavy-duty super-tough runner that is made for very large game. If you hunt in a very large tree you need the Muddy Quick Step XL. Specifications for Muddy Quick Step XL Runners: Manufacturer: Muddy Color: Black Width: 9 in Features of Muddy Quick Step XL Runners: 9in wide square steps; Silent cam-buckle fastening system; Steel bark biters attach to the tree; Steel construction; Ladder-like climb for extreme stability; Durable powder coat finish; Package Contents: Muddy Quick Step XL Muddy MCS1020: Quick Step XL Black