4 prongs, 1-7/8" (47.0 mm) wide, 2-5/8" (67.0 mm) deep Scoville Blade is a unique instrument made for use in retraction during neurosurgical procedures. This blade can be affixed to a handle or base structure via a butterfly style nut and that allows it to be more easily handled. This blade features four prongs and is 1 7/8" wide making it ideal for pulling underlying structures such as organs and soft tissue layers out of the surgical field.