substantially cylindrical mule shoe member 12 which contains a hollow bore 28 mule shoe 12 is adapted at a downhole end 13 thereof to be threadably coupled to a mud motor and associated drill bit not shown and at an uphole end 17 thereof adapted to be secured to additional bha components such as a mud pulser not shown mule shoe 12 has a camming member 24 which is insertable within bore 28 and which has an arcuate camming surface 14 thereon in the prior art camming member 24 is welded within interior bore 28 of mule shoe 12 in a desired location and angular orientation an inner cylindrical tool member 16 is adapted to be inserted within mule shoe 12 as shown in fig1 a amp 1b inner tool member 16 is adapted to contain within its bore 40 a directional measurement tool not shown and is kept in such bore 40 by threaded sleeve 42 and associated u201c o u201d ring 44 inner tool member 16 possesses an exterior arcuate camming surface 18 on an outer periphery 19 thereof which shape is complementary to arcuate camming surface 14 and which is adapted for landed engagement with camming surface 18 upon insertion of inner tool member 16 within outer mule shoe 12 in prior art mule shoe assembly 10 a plurality of.