Radius Marker, Mini, 8 in Radius ORS NASCO Integrated screwdriver nut driver shaft holds Integrated screwdriver nut driver shaft holds 8 popular tips and converts to 3 nut driver sizes Cushion Grip handle for greater torque and comfort Premium chrome plated for smooth feel and corrosion resistance Internal flanges inside handle provide solid Medium high strength the three smaller models will fit conveniently into a shirt pocket All have sturdy friction joints to maintain rigidity and accuracy 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