Adjustment screw for folding knife safety devices

A folding knife, comprising:

• a handle portion having a handle outer, a safety liner adjacent to the handle outer having a safety spring portion having a safety spring end, and a second liner adjacent to a second handle outer;
• a blade have a tang portion that is pivotably coupled to the handle portion between the safety liner and the second liner of the handle portion and operable to pivot between a closed position and an open position;
• a rotational safety pivotably coupled to the handle portion between the blade and the safety liner, the rotational safety having a safety thumb switch for rotating the rotational safety between a first position and a second position, a safe off detent, a safe on detent, and a safety engagement end;
• and
• an adjustment screw having a cavity disposed in an end, a ball having a ball surfaced lodged in the cavity such that the ball surface extends from the cavity, the adjustment screw rotatably disposed in a sleeve, the sleeve extending through and fixedly attached to the handle outer and the safety liner such that the ball surface contacts the rotational safety;
• wherein, with the blade extended to the open position, the safety spring portion is moved laterally and lodged under the tang of the blade, the safety thumb switch is rotated to the first position lodging the ball surface of the adjustment screw into the safe on detent of the rotational safety securing the safety engagement end under the safety spring portion of the safety liner thereby securing the blade in the open position, the blade is secured in the closed position by rotating the safety thumb switch to the second position thereby dislodging the ball surface from the safe on detent, lodging the ball surface in the safe off detent and the safety engagement end rotates from under the safety spring portion such that the safety spring portion is dislodged from under the tang allowing the blade to return to and securely maintain the closed position, the adjustment screw can be rotated by a user to adjust pressure of the ball end on the rotational safety.