Journal of Archaeology in the Low Countries 4-1 (October 2012)Leo Verhart: Contact in stone: adzes, Keile and Spitzhauen in the Lower Rhine Basin1
2 Adzes
2.1 LBK adzes in general
The earliest stone shaft hole implements.[3]

The technique of drilling stone to make a shaft hole was already known as early as in the älteste Bandkeramik, as demonstrated by a broken Scheibenkeule out of serpentinite at the settlement of Schwanfeld (Hessen; Gronenborn 1997, Tafel 5.9) and a single small fragment in Langweiler 8,[4] dated to the beginning of the Rhineland LBK (Bakels 1987, 62). It however appears that the technique was only rarely applied on adzes, an early example being known from Langweiler 8 as well.[5] In this way the perforated flat adze – in German formerly named Plättbolzen – was created, with a shaft hole at right angles to the edge. The perforated flat adzes became more common in the post-LBK culture groups, Rössen included (Raetzel-Fabian 1986). So their occurrence in the north will be dealt with in the next section.