Cellulose acetate material provides highest performance TPV cushion handle provides slip resistance to chemical, oil and most Treated blade tip ensures perfect fit Color coded handle for visual identification of Slotted and Phillips drives (4) SLOTTED 3/16"X3", 3/16"X6", 1/4"X4", 5/16"X6"; PHILLIPS (2) #1X3",#2X4"