Universal Swivel Blade, Harrington pattern. Called by many the “Sweetheart Blade,” Harrington Blades are measured using 3 dimensions. The first is the width of the blade at the point it leaves the handle. The second is the overall depth of the blade and the third is the width of the blade at its widest point. Harringtons are typically used to retract friable tissue such as Liver and Spleen. Mediflex® Swivel Blades are compatible with competitive Round Bar System Snap Clamps with a 3/8″ (9.5mm) opening.