Require: - The strut the toy which examines, the sharp shape in the examination process is not moved. In the majority situation, is not the unnecessary direct strut toy nose, however, if has the necessity, should in the distance above sharp shape thing 6mm which examines place the strut. if in order to examine some sharp shape to be able not but to demolish the toy Components, then its degree of hardness will be able from this to come under the influence, will be supposed to support the sharp shape for this, enable its Intensity to approach the assembly complete toy point shape intensity.

Procedure: - Twists the pine tach, through revolves the adjustment point shape determinant, causes it to the indicating lamp installment migration enough distance, exposes on the barrel the scale division datum to symbolize, the timing pin revolves the survey Lid to be bright until the indicating lamp, then locking tach. The counter-clockwise rotation survey lid, until causes read-out to move to is apart from contact dry cell battery 0.12mm (namely revolves 5 standards) the position. Then locks again tach carries on the test Refers to the direction along the sharp shape hardest spot, and exerts the sharp shape insertion lid trough in 4.5 Newton’s strength, in order to in does not scratch the trough edge nose or through slot the prominent this sharp shape situation in as far as possible the compression spring, observes the indicating lamp whether glistens.

Result: - If is examined the sharp shape, thoroughly measured above the measuring tank 0.5 millimeter, causes the indicating lamp to be bright, caused it in to receive 4.5 Newton strength in the situation still to maintain its original shape, then the sharp shape might regard as the sharp end.

(Warning: -  Do not continue to twist lock ring twist to the light, lest test pieces fall off.)