Key Hex: 17mm 19mm Heat Treated For OEM Factory Mercedes S CL Sedans Coupes & SUV Wheels Thread: 14x1.5mm Set of 4 Black Veritek Wheel Bolt Lccks For Mercedes Factory Wheels Overall Length: 2.75" 45mm Shank Seat: R12 Ball Seat 10.9 Grade Heat Treated Steel Construction Through-Hardened For Maximum Durability and Tensile Strength. Meets or Exceeds OEM Factory Standards Please note: due to multiple wheel designs available, we recommend checking your lug nut wheel design and specs prior to purchase. This listing is for a set of 20 Veritek Performance premium replacement lug nuts bolts or wheel locks. Heat treated cold forged 10.9 grade steel material. Through hardened for maximum durability and tensile Strength. Meets or exceeds OEM factory standards. Each lug nut Is hand polished or tumbled before plating resulting in longer lasting superior finish Manufactured to OEM factory standards