The KRG Whiskey 3 chassis is BY FAR the best folding system I've used, to date. It uses a dual hinge system and locks in both open and closed. By spreading the load/wear over 2 hinges it reduces the likelihood of misalignment due to wear in the mechanisms. While the MDT and SB Tactical system locked up tight, I prefer the KRG system a touch more. I still own the SB Tactical folder because of its design (locked open/ closed) Although, with as many quality companies putting out quality parts I wouldn't be afraid to use any products from well known manufacturers. I can offer 1 pice of advice.... AVOID CHINESE-MADE FOLDING MECHANISMS. They use substandard materials and specs... I purchased 1 to test myself and it was terrible.