Radius Marker, Small, 20 in Radius ORS NASCO of Knots 24 Prop 65 of Knots 24 Prop 65 YES Quantity 1 EA EA Quarterly Flier NO Special Order NO Speed [Max] 12500 RPM Stock Status In Stock Trim Length [Nom] 1 3 8 in Type Stringer Bead Design allows air to flow through the slotted hub and between the spirals on the face of the pad 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