Clovis tools are characterized by a distinctive type of spear point, known as the Clovis point. Solutrean and Clovis points do have common traits: the points are thin and bifacial, and both use the "outrepassé", or overshot flaking technique, that quickly reduces the thickness of a biface without reducing its width. The Clovis point differs from the Solutrean in that some of the former have bifacial fluting, referring to the long groove carved into the bottom edge of a point to help attach it to the head of a spear. Bifacial fluting describes blades on which this feature appears on both its sides.