The post (10) has a hexagonal portion (12) for location in a hexagonal socket in an implant and a frusto-conical portion (15) which is a seat for the coping (11).

A holder (40) with a hexagonal socket for receiving bits is arranged at the front end of the shaft.

You’ll also need an 8 mm hex socket tool to remove the drain plug from the bottom of the engine sump.

Hex socket cam followers from most manufacturers eliminate the relubrication capability on that end of the cam follower.