Locking attachment and adjustment device

A binding for coupling a boot to a sport board, comprising:

• a base plate;
• an instep support;
• at least one fixation strap that couples the base plate to the instep support, wherein the strap comprises a plurality of teeth;
• and
• an adjustment mechanism coupled to the fixation strap and laterally moveable along the fixation strap, the adjustment mechanism comprising:
• a front lever rotatable about a first pivot axis in a first and a second direction, the front lever comprising a trailing end having a flange;
• and
• a back lever rotatable about a second pivot axis in the first and the second directions, the back lever comprising a leading end configured to engage the flange and a trailing end having a pawl spring-biased to be rotated about the second pivot axis in the first direction to engage the teeth of the strap,
• wherein the adjustment mechanism is adjustable to a bi-directional locked position, comprising:
• the pawl engaged with the teeth of the strap preventing lateral movement of the adjustment mechanism in a loosening direction, and
• the flange of the front lever in locked engagement with the leading end of the back lever preventing rotation of the back lever about the second pivot axis in the second direction and lateral movement of the adjustment mechanism in a tightening direction.