Parts List:4x Blade Sharpener1x Blade BalancerProduct name: Lawn Mower Blade SharpenerKey Features:Improve Working Efficiency: Lawn mower sharpener grinder wheel stone can quickly make blunt old blades sharper, effectively improve your working efficiencyRotating Balance: Our blade sharpener has a perfect rotating balance design, which can sharpen the blade easily and quickly, saving time and energy. Wide Compatibility: Our lawn mower sharpener is compatible with hand drills, corded and cordless power drills, convenient and practical. Specification:Material: stone, metalBlade sharpener: 55 x 55mm/2.17 x 2.17 inchBlade balancer: 60 x 50mm/2.36 x 1.97 inchShank diameter: 6.35mm (1/4 inch)Application: lawn blade, lawn tractors, mower, rototillers, drill blade, etc.Note：1. Due to the difference between different monitors, the picture may not reflect the actual color of the item.2. Please allow slight dimension difference due to different manual measurement. Thank you for your understanding.