Summarize this article in one sentence.
Ratchet hoists, also called “come alongs,” can be found at your local home improvement store and online. You could secure the hoist to a strong tree trunk or a trailer hitch. Loop 1 the end of the hoist around the immovable object and secure the strap through the hook latch bolt to make sure it won’t come off the object. Generally, a ratchet hoist has 4 in (10 cm) wide nylon straps attached to it. Loop the straps around the rock, securing them with a tight knot to make sure that they won’t come loose under tension while you’re moving the rock. Once both ends of the hoist are secure, crank the ratchet by moving it back and forth. Continue cranking the ratchet until the rock has moved to the desired location. At that point, remove the straps from the immovable object and the rock.

Summary:
Secure 1 end of the ratchet hoist to an immovable object. Wrap the straps securely around the rock. Crank the ratchet to move the rock.