Ive been trying to make our lawn the best around (It is because its the only one for a long way) the lawn equipment dealer in town let me watch & ask questions of the Zero Turn Mechanic as he adjusted a Husqvarna mower like ours to make cuts better, cleaner & more level & the yearly maintenance that I'm taking over. This was the tool that they used to balance & true blades. Have another tool coming for measuring deck hight & blade level. I used the little aluminum cone before and thought that was good! WAS I EVER SURPRISED HOW WRONG I WAS