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 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 Easy to Use: Quickly restore your blade's sharpness for more efficient mowing! 1. Mount the sharpener securely, 2. Adjust the sharpening angle, 3. Fix the blade in place, 4. Attach your angle grinder to start sharpening