Multi Flex is more than a tool. Is the indispensable tool. It´s more than a fistmele and tiller gauge. MultiFlex is a sturdy tool that can be use like wrench for most of actual nocks, a wrench for 2, 3 or 4 blades broadheads and safely install them. Archers found that the three blades wrench can be used for check the correct fletching of arrows with three vanes. More : MultiFlex extreme is a useful tool for operate with peep on the string, and comes with cm (installed) and inches. A point where we focus a lot effort is clipping the string. Our MultiFlex is the most friendly of all existing tools.The special plastic used on the well known Flex-Lebrunet armguard, with a combination of strength and flexibility and rounded corners will not damage your string or serving. MultiFlex is made with a very resist plastic - fibre reinforced with a specific combination of hardness and lightness.