True about Salter harris classification is-

Salter-Harris types Feature 1 Fracture line is entirely with in Physis causing epiphyseal slip 2 Fracture line extends from physis into the Metaphysis (Thurston-Holland's fragment sign) 3 Fracture line extends from physis into the Epiphysis causing epiphyseal split 4 Fracture line extends across the Epiphysis, (aicular surface), Physis, and metaphysis 5 Crush injury of physis with initially normal X-rays