Description: 【Compatibility For】: The part number of lawn mower blade bolts is 5630351002 and 5640321002, specifically designed for lawn mower models including for LM2130, LM2133, LM2130SP, LM2135SP, LM2150SP, LM2156SP, etc. Ensures a proper fit for 21inch mowers 【Sturdy Material】: Lawn Mower blade bolts are constructed from quality metal to ensure long term durability and reliable performance during lawn maintenance tasks 【Enhanced Performance】: Addresses the issue of slow mowing speed by securely fastening the blade with support bolts and lock nuts. Replacing the blade bolt can significantly improve mowing efficiency 【Proper Dimensions】: Each component of lawn mower blade bolts is crafted with 1.88 cmx2.1 cm/0.74 inchx0.83 inch, ensuring optimal compatibility and functionality with your mower's existing setup 【Complete Package】: Comes with a set of 2 screws and 2 bolts, providing everything you need for a straightforward replacement process to keep your mower running smoothly Specification: Material: Metal Size Chart: 1.88cmx2.1cm/0.74inchx0.83inch Package Includes: 2 Screws 2 Bolts Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.