Review on QLLY 16 Inch Adjustable Metal Furniture Legs, Square Office Table Furniture Leg, Set Of 4 (Black) by Alex Smith

Followed other reviewers, bolted with washer through mounting bracket into leg. Tightened to a wicked strong torque with a power drill.TL,DR: Don't trust this product to slide across a surface well, especially with weight greater that 50Lbs by my estimates.I'd expect this product will work great for users who can mount bracket to leg as described above, and whose material and span is reasonable, and can place whatever it's mounted to carefully, with help if necessary.My build prior to trying to resolve issue with horizontal bracing, 3 2x12x8 boards laid said by side, joined with several metal brackets where boards meet. Problem I'm experiencing is that, when the leg is dragged across a surface, the leg catches and pitches in a direction, and, I'm assuming, the locking washer and bolt slip off of their thread, causing plate and bracket to become loose. When I detach a leg after this problem, bolt is finger tight, not torqued as well as I had screwed it on before attaching leg and plate to underside of table top.I may buy screws and washers to try and bolt through the table top, circumventing my problem or at least allowing for easier retightening of screw.I'd seek a refund, but I damaged the product by attaching horizontal supports as pictured.