COMPATIBLE WITH:Lawn Mower Blade Bolt & Nut Compatible with EGO Power+ Parts Lawn Mower Models: LM2130, LM2133, LM2135, LM2150SP & LM2156SP, LM2150SP and LM2130SP & LM2135SP 21"Lawn Mowers FIX SYMPTOM:If the cutting speed of the lawn mower slows down and the work efficiency decreases, it may be caused by loose blades.The support bolts and hexagonal locking nuts provide a fixing effect. You can try replacing the bolts and nuts of the lawn mower blades to trim the lawn faster and improve work efficiency PACKAGING INCLUDES:Including 2x Blade support bolts and 2x Blade common torque hex lock nuts, Part number:5640321002 Blade support bolt and 5630351002 blade common torque hex lock nut PRODUCT SIZE:Blade support bolt length: 0.77 inches, height: 0.85 inches, thread length: 0.65 inches PREMIUM QUALITY:The bolts and nuts of the lawn mower blades are made of metal materials, sturdy and robust, with a long service life. They can firmly fix the blades and prevent loosening, restore the working state of the lawn mower, and improve work efficiency Lawn Mower Blade Bolt & Nut 5630351002 5640321002 Compatible with EGO 21" Lawn Mowers,Mower Blade Bolt Nut Kit fits for Lawn Mowe Models LM2130, LM2133, LM2130SP, LM2135SP, LM2150SP & LM2156SP