Also for me being able to carry on a conversation with my wife while playing goes a long way when were playing together. That is a concern as without the lock someone can walk off with the rack and you just can replace the locking bolt. I am super frustrated right now and am shipping them back to buy a pair from a different company! And, they look good and are comfortable. Not big deal, maybe its because the heat. So far Ive not had any problems with any of the tozo products and I have had multiple of everything in terms of value for the dollar these are the best quality products you can get right now. My biggest issue is the sizing is way off. For $130, I except more than 6 months of listening. My table saw has a 4" port and this product has a 4" port - guess what? They dont fit as theyre exactly the same. It doesnt even deserve 1 star but I have to 1 star it in order to write a review.