The Front Runner Axe Mounting Bracket is a safe and secure option for traveling with your long handled axe. Bolts slide in to the slot of a Front Runner Slimline II side rail or can be adapted and bolted to other racks or surfaces. Axe head is protected in steel cage. 2mm (0.078â€) Black powder coated steel. Can accommodate most axe sizes. Mounting requires axe handle to have hole diameter of 12mm (0.5''). Note: This product is not compatible with Slimsport rack kit range.