3D Printed Grappling Hook

Here's a simple 3D printed grappling hook. It depends how much you want it thick, and how heavy you are, but the hook probably won't support you when mountain climbing...

You will need:

-Para cord

-A computer

-Access to a 3D printer

-A little bit of knot-tying skills.

Using 123d, make a rectangle 20 by 20 by 70 (you don't have to use 70, you can choose the height.)

Using the draw function, draw squares on the top sides of the rectangle. Enough said.

Use the extrude function to extrude each square. Extrude it by 40mm.

Draw rectangles on the hooks like in the picture. It's easier that way.

For each rectangle, do extrude -20.

For the hole for the para cord, draw a circle, and extrude it -20.

Merge all the pieces together.

Tie the para cord to the grappling hook through the hole.