9PCS; CONTENTS: 1/4": E5, E6, E7, E8; 3/8": E10, E12, E14, E16; ADAPTER: 1/4"(M)X3/8"(F); MATERIAL: CRV 50BV30; LENGTH: 25MM; DIN 2124; HALF POLISHED - HALF SANDBLASTED, KNURLED RIM IN THE MIDDLE