- ZWILLING Professional 'S' 5.5" Boning KnifeRegular Price Product was previously at: $144.99 $144.99 Special Price $115.99Currently only available in storeZWILLING Twin Master 8" Butcher Knife (Yellow)Regular Price Product was previously at: $54.99 $54.99 Special Price $43.99Available online Available in storesZWILLING Twin Master 10" Butcher Knife (Yellow)Regular Price Product was previously at: $59.99 $59.99 Special Price $47.99Available online Available in stores