1888 13 Apr. 172/1 1 post-drill 15 inches.
1975 lix. 46 Post drill.., a drill supported by a post running from top to bottom immediately in front of the face which is turned and driven into the coal by rotating a handle that fits into a gear box mounted on the post.
2001 C. H. Wendel 60/2 Very early post drills in good condition will often bring over $200, with even the more common ones of the twentieth century bringing $100 or more at times.