This will teach you to make a grappling hook

Step 1: Get Metal Rods

Use 1/4 inch metal rods for this project.

Step 2: Cut Rods

Cut one of the metal rods to 10 inches. Cut another to 20 inches. Use an angle grinder or bandsaw.

Step 3: Bend the Rods

Bend the 20 inch rod in the middle with a vise and pliers to make a loop in the middle. Then bend the ends to make the hooks. Bend the 10 inch rod to make the third hook. The hooks should open to about 2 inches.

Step 4: Weld Them Together

Evenly space the hooks and line up the shafts. Place a couple of tack welds on each side to hold it together. Weld a bead on each side to finish. Grind them smooth and sharpen the ends of the hooks.
Paint it if you want.