Toric Axis Marker, Two Rotating Blades, 11mm Inside Diameter, 15mm Outside Diameter, Measures 0 to 180 Degrees in 10 Degree Increments (Labeled Every 30 Degrees), Extra Thin Head Mounted on Handle at the 0 Degree Position, Holes in Head Every 90 Degrees for Visualization, 40 Degree Angled Shaft, Round Handle, 115mm Overall Length, Titanium