A sling blade is a tool that has a long, curved blade attached to a handle. It's kind of like a big knife that you can hold onto with your hand.
People use sling blades to do work outside, like cutting grass or weeds. You swing the blade back and forth to chop up the plants.
One thing that makes a sling blade special is that the blade is curved. That makes it easier to cut things at an angle.
Sling blades can be pretty heavy, so you have to be careful when you use one. You need to use both hands and make sure you're swinging it safely.
Overall, a sling blade is a tool that you can use to make your yard look nice and neat!