leading end to the outer periphery of the entering end portion which is defined by the cylindrical surface 23 of the entering end portion which in this example has the same radius as the shank 16 the axis of this cylindrical surface 23 is of course the axis 11 the second cutting edge 21 is also inclined to the axis 11 at 541 2 u00b0 and is diametrically opposite to the first cutting edge 19 the second cutting edge 21 extends from the second tip 22 at its leading end to the periphery of the entering end portion the leading end of the second cutting edge i e the second tip 22 is offset radially outwardly from the shank axis 11 and is also offset behind the first tip 18 the radially outer ends of both cutting edges 19 and 21 both lie in a common plane perpendicular to the axis 11 the length of the second cutting edge 21 is substantially more than half of the length of the first cutting edge 19 and in this example the length of the second cutting edge 21 is about 90 of the length of the first cutting edge 19 between the first tip 18 and the second tip 22 is a small gap or void 24 the edge 25 of the material of the drill which lies between the first and second tips and which in use of the drill might be effective as a cutting edge all lies axially behind a straight line joining the first and second tips which line is in fact an extension of the line.