1. 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 helpful tool, providing accurate blade balancing to extend the life of your lawn mower. 2. Long service life, that's why our wall mount blade balancer is made of aluminum metal, which has wear resistance and durability, and six powerful magnets provide stability. Manufactured to specifications for easy installation. 3. Compatible with 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. 4. Replace NO: 339075B, 42-047. Our balancers are 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. 5. product Magnetic wall-mounted blade balancer with 6 powerful magnets for wear resistance and durability, provides precise blade balance and prolongs the life of your lawn mower. 6. Material: Metal 7. colour: A-Red 8. Package Contents: 1 x hook blades 9. Only the above package content, other products are not included. 10. 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.