Favorite banana plugs?

So, is the theory behind these BFA plugs that it has a higher contact area than the springs in a normal banana?  Because almost the whole cylinder is making contact?

On the Viborg, these look nice with the linear spring, should have similar contact area to the BFA's.  These for example:  Amazon.com: Viborg VB402R Pure Copper Speaker Banana Plugs (4pcs/Set) Rhodium Plated, Hi End Red Copper Audio Banana Connectors for HiFi Speaker Cable Wire DIY : Electronics

About the same price as the BJC locking one's, and I agree the locking feature is controversial.

Honestly I am liking the Viborg one's they look like just the right balance between price and quality... hex key instead of flat-head screws, comes with the shrink tube, even has choice of colors.

Thanks much

-J

Hey, take a look at these:  Amazon.com: Viborg Silver Plated Banana Plugs, Screw Locking 4MM HiFi Speaker Connectors for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver, Amplifiers and Sound Systems 8PCS : Electronics

Are they possibly too cheap?  Could it be a knockoff?  Almost seems like the situation similar to the Nakamichi one's.  But, if they are legit, very cheap and basic, kind of what I am looking for.  Just curious that they are so much cheaper than the other one's I mention.  Danmar123, could you tell me specifically which one's you used?  Is it these?: Amazon.com: Viborg 4X HiFi Speaker Banana Plug Connectors, VB401G, 4MM Gold-Plated Pure Copper Dual Screws Locking Banana Connectors for Hi-end Speaker Cable, Home Theater, Audio/Video Receiver, Amplifiers : Electronics  I assume they don't actually mean bare copper, there must be a coating on it to prevent oxidation.

Thank you for the info reubent, that is probably my main concern, that they will fall out.

-J