Ergonomic Keyboard Tray with Sliding Mouse Platform & Adjustable Wrist Rest - Under Desk Mount for Home Office & Gaming Setup - Perfect for Computer Workstations, Typing Comfort & Space Saving

The item was received defective.The main tray has two tapped screws one at each side towards the back that enter through the top and the mouse tray has a rubber bumper that is supposed to hit those screws to prevent the mouse tray from falling out and onto the floor. The bumper on the one I received was not even close and the mouse tray would not stay in the keyboard part falling everytime it was opened.This bumper also looked to be poor quality and will likely break or move on anyone who buys this and doesn't put a machine screw into it to hold it in place. Because the keyboard tray is a full box not just brackets the mouse tray sits on like other models I have used that machine screw would have to go into the bottom of the mouse tray where you will have to counter sink the head and use a tapered flush mount screw with maybe 1/4" of thread.There was no place to insert a screw to lock the mouse tray in an open position either if you didn't want it sliding in and out all day. The mouse tray sits on these strips of gel putty (reminded me of shoe insert gels) that is how it glides back and forth and I don't know how well this would stand the test of time say over a ball bearing design. I don't like products I have to remodel in order for them to work properly or that have clearly inferior parts that make up a single point of failure.To make matters worse the mouse tray has an up-turned lip that doesn't clear my mouse pad so in the 5 min I was examining it, it sliced my wrist. The mouse pad tray also is only about 6 inches from front to back so it didn't have enough room for my Logitech Performance MX to move around to reach the edges of my Windows desktop.Poor design, defective, only for people with small hands and small mouses. Will try Ergotrons wall mount version next it has a larger mouse tray with no edges but price is 3x as muchIf I was guessing based off measuring my desk where I sat this to test it I would say the keyboard tray is 18" wide and 8" deep but extendable up to 10 inches and the mouse tray is 6"x16" but the bumper is midway so only half of it sticks out at any time makin the whole thin 26" when the mouse tray is out.Buyer bewareWorks like I thought it should, pretty simple design, easy to installMy son and I modified a 1890 old schoolhouse students desk. As the wood is solid oak wood, we adapted the front of the desk with this keyboard and mouse tray. It is very heavy, so its a good balance weight for the desk itself. It was the smallest functional tray I could find for such a DIY, with needing to use bolts with washers and bolts to create extra strong mount, I would not say it suitable for a lighter wood as pine etc.