When you buy a Quik Lok stand, you just don't buy any "X" stand, you invest in a expandable system that can be configured in a variety of ways to fit any keyboard players' needs. A new, strong, non-slip, lightweight aluminum alloy locking collar *(Patented Design) called the Grip Lok 30 is used to anchor the accessories to the main stand. QLX-3 is a fully adjustable Second Tier add-on for "X" stand with 30mm steel tubing. QLX-4 Mic boom or QLX-5 music holder can be added.