of penetration it has been discovered that it is an easy matter to 34 thread 34 the tube 50 onto the boring means 10 if the tube 50 is made of a material that is soft enough to be cut by the flute s 30 thereby allowing self tapping of the tube by the flutes the tube 50 is then constrained to move in rotation on the boring means by the flute so that the advancement and positioning of the tube 50 is highly controlled the method of use of the present invention for boring a nail comprises certain preferred steps including positioning the end shoulder 60 of the depth controlling means 50 near the cutting edge 35 of the hole boring means 10 positioning the cutting edge 35 over a subungual hematoma 90 and in contact with a surface 80 of a nail to be bored rotating the cutting edge 35 1 4 rotation clockwise and then 1 4 rotation approximately counterclockwise in turn alternately driving the cutting edge 35 into the nail until the depth end shoulder 60 contacts the surface 80 of the nail adjusting the end shoulder 60 away from the cutting edge 35 and then repeating these steps in turn repetitively for small incremental advancements of the cutting edge through the nail until a fluid flows from the penetration adjustment of the end shoulder 60 is accomplished by rotating the tube 50 on the side wall 20 of the.