Product detail 1) Material : carbon steel ,special material 2) Surface finish:phosphating ,chrome plated,electrophoresis black,zinc 3) Process : heat treatment ,drop forged 4) Size : 8mm,9mm,10mm,12mm,13mm,14mm,17mm,19mm 5) Style : L type with a hole,two ends socket with hexagon. Advantages 1) speicial material for superior quality and longevity 2) phosphating surface finish for environmental protection ,rust protection and best price 3) attractive apperance 4) First class service from promotion to long-term cooperation 5) Fuction : deep profile grooves and additional end are designed to adapt to additional reqirement