in fig3 and 4 the lower portion of the side walls is reversely bent in a u shaped formation providing upwardly extending inner legs 55 and 57 for a purpose to be described it is pointed out that the width of the drive at this lower location is somewhat narrower than in the upper zone for the purpose of securing the protective shield in covering relation of the out drive as seen in fig1 a locking pin shown in fig6 and 7 and designated by the numeral 34 is provided the locking pin is sized and configured for passage through the space 30 and through the aligned holes in the lower portion of the side walls 39 and 41 and legs 55 and 57 adjacent the lower edges generally the holes are designated by the numerals 62 and 64 the locking pin is of steel as is the shield proper in the preferred embodiment referring more particularly to fig6 and 7 in one preferred embodiment the pin 34 has a central portion 70 which is of reduced diameter and through the center of which there is provided a hole 72 once the pin is inserted so as to pass through the space 30 and the holes 62 and 64 it is of a length such that it extends outwardly from each hole a padlock designated by the numeral 75 is secured to keep the pin in position the locked position described it will be appreciated that the length of.