These are two 360? Swivel Blades from Revell Monogram.

FEATURES: For cutting curves, circles and designs

INCLUDES: Two 360? Swivel Blades and Storage Case

REQUIRES: Swivel knife handle, RMXR6927  

BOX DIMENSIONS: 1.75" W. X .50" H. X 5.38" L. BOX WEIGHT: .02 LBS.