Perfect for an existing in ground pool with a concrete deck. This stainless steel (304) railing can be set back about 12\" from the edge, and still protrudes well into the pool covering 3 steps. This offset allows for secure mounting into the concrete without concern about cracking. The railing comes with a complete mounting kit, including a 12mm drill bit. The anchors seem a little flimsy, but actually hold very well. The 12mm bit has a square shank that does not fit well into a standard chuck. I purchased a 7/16 (11.1mm) round shank masonry bit which worked very well. I marked each hole to be (hammer) drilled, and used a smaller masonry bit as a pilot hole. This kept the larger bit from migrating off of center, which resulted in perfect alignment. Use clear silicone under the mounting plate to keep out water and cushion the surfaces. The SS lag bolts seated perfectly with a socket wrench; I added SS washers to facilitate tightening.