The fine threads of these pins are proud of the shank eliminating the weak point where the thread ends in other pins. The major benefit of positive pins is that the additional thread diameter creates a larger bone pin interface for agiven shaft diameter. This style of pin is useful where a good pull out resistance is required and where it is anticipated that the frames will be left in situ for long periods - 6 weeks plus. Use KE Plus Clamps if available. Place at right angles to the bone.