The Blade Support (Bell Blade Support) fits between the bottom of the blade and the blade bolt to provide support for the blade. It is installed underneath the cutting deck on the blade. Installation requires a hammer, 5/8 socket and torque wrench, and is rated as "Easy" by our customers. If broken or damaged (likely due to fatigue) you may hear a rattling sound coming from it, and the part should be replaced. This part is dark gray/silver, individually sold, and measures approx 3.5 x 1.25 inches. Refer to your make, model and diagrams to check if this is the correct part for you.