Dr. Buzbys ToeGrips are the only product on the market that use dogs natural bio-mechanics by providing traction through their toenails. ToeGrips were designed for senior, rehabilitating and special needs dogs. Dogs that scruff/drag their paws make require affixing the ToeGrips onto the nails. ToeGrip are NOT intended for healthy, active dogs. Dr. Buzbys ToeGrips are natural rubber cylinders that slide onto a dogs weight bearing toenails, adhere by friction and create the GripZone. Benefits of ToeGrips are: improved mobiity and stability, increased confidence and reduced risk of slip-fall dog injuries. You no longer have to consider covering your whole house in dog floor mats. Throw rugs are gone with ToeGrips! Large Sizing: Nail circumference: 20mm - 23mm.