Wide Compatibility: VEVOR lawn mower blade sharpener comes with 4 different adapter pins, compatible with various angle grinders. It is suitable for blades up to 30" length, 0.28" thickness, and 2.76" - 5.51" width. (Angle Grinder Not Included) 15° - 45° Adjustable Angle: The adjustment knob and clear angle scale allow you to easily set the sharpening angle from 15° to 45°, achieving precise blade sharpening with customizable angles for optimal mowing performance Precise Blade Balancing: After sharpening, you can use the included lawn mower blade balancer to ensure your blades are properly balanced, reducing vibration and engine wear for a smoother, more efficient mowing experience. Featuring 6 strong magnets and made from high-quality aluminum, it is stable and durable Stable & Smooth Operation: The lawnmower blade sharpening tool's guide arm is designed with ball bearing for smooth movement. 4 holder bars securely hold the blade, and the 25mm diameter enlarged handle offers better grip stability, less hand fatigue High Quality Material: Crafted from lightweight yet durable aluminum alloy, this blade sharpener for lawn mower offers exceptional wear and corrosion resistance. Lightweight and compact, easy to carry to different work sites