6061 AIRCRAFT GRADE ALUMINUM CNC MILLED COMPONENTS - ?Precision Milled Hard Anodized Aluminum for high performance and durability.304 STAINLESS STEEL HARDWARE - ?High Grade Corrosion Resistant Hardware for years of reliable trouble free performance.LOW PROFILE HINGED CLAMP - ?Clamp design provides extreme clamping power, minimal interference with other accessories, and a simple installation.STAINLESS STEEL BALL STUD LOCK BOLTS - ?Set Bolts can lock mirror into plate or be adjusted to allow for smooth movement with enough resistance for micro adjustment.ALUMINUM BILLET LOCKING BLOCK - ?Locking block and bolts lock ball stud in place to prevent unwanted movement under the roughest condition.LASER ETCHED GRAPHICS - ?High Resolution Laser Etched Graphics on Hard Anodized Aluminum Finish won - ?t wear off.