MATERIAL: The Deck Spindle Reinforcement Rings are made from ASTM A572 Grade 50 steel, a type of steel that's really strong. The surface of the rings is treated with Cataphoresis, which gives them great rust protection FUNCTION: The Lawn Deck Spindle Reinforcement Ring makes your spindle assembly stronger, cuts down on wear and tear, keeps vibrations to a minimum, and helps your mower last longer. It's a great way to fix things without having to buy an entirely new deck, saving you money in the long run. ASSEMBLY TOOLS: We provide 12 mounting bolts and a L-shaped angled hex socket wrench to help you with your replacement, making the process easier and more convenient FITMENT: This Deck Spindle Reinforcement Ring kit is compatible with all series of spindles for Cub Cadet, MTD, and Troy-Bilt lawn mowers, lawn tractors, and lawn decks PACKAGE INCLUDES: 3xSpindle Reinforcement Rings+12xMouting Bolts+1xL Shaped Angled Hex Socket Wrench POSEAGLE 2 Pack Upgraded High-Strength Deck Spindle Reinforcement Rings with Mouting Bolts and L Shaped Angled Hex Socket Wrench for Cub Cadet, MTD, Troy-Bilt All Series Lawn Tractors and Lawn Mowers