This is a Knex switchblade that has a trigger which makes a blade swing out. the blade is sturdy, it doesn't use many pieces, and the knife overall is very reliable.
Dark grey: 2
Light grey: 1
Black Y connectors: 3
Black ball joint connectors: 1
Step 1: The Main Body
The part that the blade is held in.
Step 2: The Blade
Step 3: Other Pieces
These will connect the different parts.
Step 4: Putting It Together
Connecting it all.
Step 5: Where to Put the Rubber Bands
Let's put on the rubbies.
Step 6: How to Use
Pull the blade around into the main body until it can't go any further, and then push the ball joint down so that the Y connector on the blade clicks into the ball joint.
To open it, push the white rod that the ball joint is on up with your thumb and the blade will swing out.