I first saw this on J_scap's RBG video. and I really liked it.
Credit to J_scap for the vid and knife.
2nd pic. the first knife LOOK HARD to find the differences (or cheat and see what the yellow boxes say).
Step 1: Parts
metallic blue clips-1
Step 2: Handles
pic 1 first simple handle insert 1 yellow rod into holes
pic 2 second handle, harder to make. I'm too lazy to tell how to make it.
Step 3: Body
pic. 1 make this.
pic. 2 make this.
pic. 3 (hard to see) put the thing in 2nd pic. into hole from the 1st pic.
pic. 4 same as pic 3.
pic. 5 add blue metallic clip on other side.
pic. 6 another angle.
pic. 7 add the concrete/silver rod for the blade
Step 4: Adding Handles to Body
pic. 2 slide onto the body.
pic. 3 add another grey clip onto the handle end and body (do for both sides).