Heat treated for longer life with a longer, narrow nose for confined areas. Simple conversion between internal and external operations. Heavy duty return spring. Sealed air pocket Channellock Blue grips for comfort. Includes: (5) five pairs of color codedinterchangeable tips: external-1/4 in to 2 in , internal-3/8 in to 2 in includes tips: .036, .047, .070 straight and .036, .047 90° .