If you often sharpen your own lawn mower blades, or you have been using the nail of balancing your lawn mower blades for a while, this may get worse each time after sharpening. This magnetic blade balancer is your must-have tool, providing accurate blade balancing to extend the life of your lawn mower. Long service life, that's why our wall mount blade balancer is made of high-quality aluminum metal, which has high wear resistance and better durability, and six powerful magnets provide better stability. Manufactured to specifications for easy installation. Compatible with for all lawn mower blades, , etc. It will balance any mower blade with a hole in the middle. The metal rod is to check the blade to see if the blade is bent, when the blade is balanced it will be level. 339075B, 42-047. Our balancers are very sensitive to balance. When installing the balancer, make there is enough space on both sides so that the blade can rotate 360 degrees without in the way of anything. product description: Magnetic wall-mounted blade balancer with 6 powerful magnets for high wear resistance and better durability, provides precise blade balance and prolongs the life of your lawn mower. Replace NO#: 339075B, 42-047 Material: Metal colour: A-Red Package Contents: 1 x hook blades Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.