Arnold Mower Blade Sharpener & Balancer Combo Pack is a high-speed rotary blade sharpener and static blade balancer designed to work with any 1/4" or 3/8" electric drill. This convenient combo pack saves you money by allowing you to sharpen your mower blades quickly and efficiently, delivering a sharp edge in just minutes. The blade balancer ensures safe, vibration- operation by easily indicating which side of the blade is too heavy, making it for maintaining rotary mower blades. This pack includes one blade sharpener and balancer, packaged on a card for easy storage and use. Model Number: 490-850-0006