sharpening the sharpening wheel 38 is preferably made of electroplated cubic boron nitride cbn though other sharpening stones may be used as are known to those of skill in the art preferably the wheel is a stainless steel blank having cbn bonded to the blank with electro plated nickel there are many advantages of using a wheel of this composition namely the wheel can be used directly after cleaning while still wet and will not disintegrate also the wheel does not absorb water or fat accumulated on the knife and therefore will sharpen the blade faster and more efficiently than other sharpening stones presently being used fig4 a is a right side view of the sharpener assembly in the sharpening position showing the extended truing arm 54 fig4 b shows fig4 a in a retracted non sharpening position the truing arm 54 rotates from a pivot pin 56 on one end and includes a honing stone 58 which cleans and deburrs the front side of the knife as it is being sharpened the stone 58 is hinged to the opposite end of the arm 54 by pin 59 the truing arm must be long enough and curve a sufficient amount in order to reach over the knife so as to contact the reverse side of the knife during sharpening the honing stone 58 is smaller than the sharpening stone 38 and can be made of any suitable material the stone is biased against the knife by a spring 60 that is held in place by a retainer 62 the truing arm.