Turn Knob Lock Feature: Designed for 10-12mm tempered glass door Rational structure and convenient installation High strength die-cast aluminum or zinc alloy body, safe and durable Stainless steel material or aluminum material cover plate Special oxidation-resisting spacing pad Cover Plate Finishes: Polished Stainless Steel (PSS) Satin Stainless Steel (SSS) Titanium Plated (TI) Satin Silver Anodised (SSA)