A flexible guardrail bracket that can be mounted over both arched edge and wall top. The Clamp is the strongest and fastest in the market, the opening is roughly adjusted with a simple grip, and then tightened with the help of a machine. The tightening screw has access from both directions, which makes it possible, for example, on the wall top to choose whether the post mounting should be on the inside or outside of the wall top and it is still as easy to tighten the Clamp. The bracket comes with GuardLite Active Lock for solid mounting of the guardrail.