These dividers have a forged steel bent leg with sharpened point and an adaptable straight leg for marking with either a scriber needle or with ink. They have up to a 14″ span. The bent leg allows easier scribing along walls. The adaptable straight leg holds either a scriber leg with replaceable needle (No. 129) or a replaceable inking leg (No. 1380-P). The two large steel thumb knobs are knurled for easy tightening. The needle is held on the scriber leg with a knurled steel tightening cap.