of 5 32 inches with the length of the reduced diameter central portion being 3 08 inches the diameter of the end portions 24 is 1 12 inches and that of the reduced central portion 23 1 03 inches the pin 21 extends through upper and lower openings 27 see fig5 and 6 in the upper and lower walls 19 of the point 16 it will be appreciated from a consideration of fig5 that the point 16 is reversible either side can be positioned upwardly or downwardly as wear patterns develop the pin also extends through a vertically extending opening or passage 28 see fig1 in the adapter nose 14 the passage 28 can also be seen in the adapter 12 as depicted in fig8 and also at 128 in the version of the adapter 112 seen in fig9 the passage 28 or 128 as the case may be is contoured so as to receive the basket spring 22 in other words the passage 28 is radially enlarged so as to conform to the shape of the ellipsoidal shape of the basket spring 22 in effect the spring central portion has the shape of a double truncated ellipsoid the basket spring 22 in the example given above relative to an approximately 8 inch wide point is developed from a blank 29 such as is seen in fig1.