If you are still confused by the following problems,the smartelf Self Cleaning Slicker Brush or Pet Grooming Brush will help you out. 1.Excessive hair and fur can be a challenge for you. 2.General comb can’t go deep into your dog’s thick hair. 3. It’s really difficult to clean those hairs from your pet around the house. 4.How to thoroughly dig the hair out of the brush? More questions what most other customers want to know? Does the button have to be kept pushed down during grooming? -NO.It clicks and locks into place. When you are done you click again and it retracts. It\'s a clicker button just like pens. Click it once and it stays out, click it again and it goes in. How to self-clean? -It\'s super easy to clean just push the medium blue button and bristles retract then. and wipe the hair off. How long are the bristles? -About 3/8 inch. What pets type it works on? -It will work on dogs cats other pets(labrador retriever,german shepherd,golden retriever,goldendoodle,newfounfland,tibetan terrier,doberman dander,american bulldog,himalayan cat,cockapoo,husky,ragdollcat)with all sizes and long,medium,short,thick,wiry,curly hair. Using Method: 1 Brush your pet\'s fur for once time in morning and night,and each time you need to brush for 5 minutes. 2 Carding Order - Along the direction of fur growth,brush your pet\'s fur from neck to shoulder and then to chest,waist,abdomen,abdomen,rear quarters and then to the head,the last are legs and tail. 3 Carding Skill - Along the direction of fur growth,gently move your brush.Especially for some long fur pets,you need to brush layered fur.