Adjustable Height Laptop Cart With Storage....by Techni Mobili is a really nice, heavy, solid and sturdy cart! It's not complicated to put together and it comes with clear instructions and all the pieces are numbered. The holes may look to small, but all one has to do is gently put the top of the screwdriver, THAT COMES ALONG WITH THIS UNIT, into the hole and it will open up to the size it's suppose to be. The round Cam Locks, which are described and illustrated on page 5 of the Instruction Manuel, MUST BE TIGHTENED WHEN DONE SO THEY WILL HOLD THE CAM BOLT IN PLACE, THUS KEEPING THE PIECES OF THIS UNIT JOINED TOGETHER! I saw Reviews with pictures complaining that the Cam Bolts were not holding the pieces together, but it's obvious the customer forgot to tighten up the Cam Locks, see page 5 of the Instruction Manuel. The Cam Locks(see page 5 of Instruction Guide) are positioned and used to clamp down and hold the Cam Bolt in place! It would be wise, for one with Carpal Tunnel, Arthritis and/or Etc., to use a LONGER screwdriver like the one I have pictured; It will make it more easier on ones hands; Yes, this unit comes with a small screwdriver, but it's better for a person with problematic hands to use a LONGER one like the one I have pictured! I'm satisfied with this purchase and I put it together all by myself with the help of the Lord! This unit came with NO SCRATCHES, DEFECTS, MISSING PIECES OR PARTS! It was also packaged very nicely to keep it from being damaged and the box was EXTREMELY HEAVY! I set it, where it will STAY, to it's HIGHEST HEIGHT. Make sure you tighten it good. It will wobble if you make it, but it will not do it on it's own and make sure you tighten the turn knobs that hold it in place and it will be groovy!