This pointed nib chattering tool with the forward angle on the left side of the handle enables the artist to make marks on the inside of wheel thrown pottery. The artist can hold the tool's handle at a 30-degree angle and make marks with the nib parallel to the axis of rotation.  With the hinge point of the tool titlted 30 degrees to the axis of rotation of the pottery being chattered the nib moves up and down as it makes marks!