Radius Marker, Small, 20 in Radius ORS NASCO with a hand pad block with a hand pad block Hot drop forged nickel plated blades are strong and durable Configure the SET EASY® pivot adjustment to match your preference Handle rings designed to comfortably fit users' hands Red dipped grip handle options available (W20P and W22P) Blunt safety point blades option available (W20SP) Precision tools made of rust proof aluminum and anodized for lasting protection The arms are precisely aligned with spring tension joints to guarantee accuracy and rigidity The holder accommodates flat or round soapstone and pencils All are a folding type design the three smaller models will fit conveniently into a shirt pocket All have sturdy friction joints to maintain rigidity and accuracy