THESE ARE BRAND NEW TOP QUALITY KNIFE SHARPENERS WITH 3 in 1 SHARPENING SYSTEM, CONSISTING A 300# GRIT DIAMOND WHEEL FOR COARSE GRINDING IN "V" SLOT No.1, A 600# GRIT DIAMOND WHEEL FOR MEDIUM SHARPENING IN "V" SLOT No.2 AND A 1000# GRIT CERAMIC WHEEL FOR VERY FINE HONING IN "V" SLOT No. 3. IDEAL FOR ALL KINDS OF KITCHEN KNIVES, FRUIT KNIVES, CHEF KNIVES, DAMASCUS KNIVES AND ALSO FOR CERAMIC KNIVES etc,, THESE HANDY SIZE SHARPENERS ARE FITTED WITH VERY STRONG SUCTION CUP, WHICH CAN BE EASILY FIXED ON ANY FLAT & SMOOTH SURFACE i.e, GLASS OR KITCHEN WORKTOP etc,, BY SIMPLY PLACING THEM FLAT AND TWISTING THEIR BODY IN CLOCKWISE / ANTI-CLOCKWISE DIRECTION (NO OTHER SHARPENER OF ANY BRAND ON eBAY HAS THIS EASY SUCTION SYSTEM, MOST HAVE HARD LEVER UP/DOWN SYSTEM). ITS A GREAT SIMPLE KITCHEN GADGET WHICH OFFERS A SAFE AND SIMPLE SINGLE HANDED OPERATION