Laube Big K Comb Attachments are an inexpensive and versatile way to clip coats to any length.***The cutting length specified for each comb size may vary depending on your dog's coat texture. Flat and drop coats will be cut longer than stand up coats. Tilting the clipper slightly towards the teeth will clip shorter while tilting slightly towards the rear of the blade will leave the coat longer. Clipping with the lay of coat will leave more length while clipping against the growth will cut shorter. Experimenting with the combs is the best way to find out what works best for your breed. Comb attachments come in solid black or yellow. For Best Results the Big K Combs should be attached over a #30 blade However, they are GUARANTEED to fit any brand #10, 15, 30, 40 or 50 clipper blade. Comb attachments will not go through matted or tangled coats. The dog's coat should be clean, tangle and mat free before using. For cleaning Big K Combs while attached to the clipper blade we recommend Dr. Slick.