There is wide difference of opinion regarding the use of these thin ovaloid, triangular, and disc forms. Obermaier considers that they may have been clamped in wood, or furnished with a shaft, thus forming a spear head. Another suggestion is that they were used with a leather guard to protect the hand; and there is no doubt that in either case they would have served as effective weapons in chase or war. Another view is that of Commont,(37) who believes that not a single implement down to the very end of Acheulean times can be regarded as a weapon of war; this author maintains that many of these implements, including those dressed on both edges, were still in various ways grasped by the hand, although they do not present the firm, blunted grip of the ancient coups de poing. We also note the development of a type of coup de poing, with cutting blade fashioned straight across the end: this primitive chisel or adze-shaped tool may have been used as a chopper, or as an axe, in fashioning wooden tools. [Illustration: FIG. 84. Method of producing the long _flake_ and the central _core_ of flint by sharp blows at the indicated point of percussion. After R. R. Schmidt. In this case a series of flakes have been cut off the entire periphery of the core. The primitive use of the flake begins in the Pre-Chellean.] In the lance-pointed coup de poing of narrow, elongate shape, the flaking is very simple and the edges are continued into the short base, generally very thick, and often showing part of the original crust of the flint nodule, which is well adapted for the grip of the hand. This implement, which serves the original idea of the coup de poing, develops into the round-pointed and lance-pointed forms. There is no question that, whether in industrial use, in war, or in the chase, these implements were held only by the hand. INDUSTRIAL. _Coup de poing._ Ovaloid. Double-edged. Subtriangular. Straight cutting blade across the end. Disc-shaped. Triangular--very thin and flat. Hachette, chopper. Grattoir, planing tool. Racloir, scraper. Perçoir, drill, borer. Couteau, knife. 'Pointe' (Levallois blade). 'Pointe,' point--oval and chisel-shaped. WAR AND CHASE. _Coup de poing._ Of pointed and lance-pointed types. Pierre de jet, throwing stone. Couteau, knife. 'Pointe,' dart and spear heads.