Exceptional Strength and Rigidity; Exclusive Twist-Lock Concealed Flange Snaps into Place for a Secure, Tamper-Proof Mounting; Bar Can't Separate from Flange; Nominal Offset Distance of 1-1/2 Inch; Flat Contact Surface Won't Cut Wall Surfaces Bar Remains Stable without Further Tightening; ADA Compliant; Made in USA 1-1/2" x 48", 18 Gauge, Satin, Stainless Steel, Concealed Flange Mount, Straight, Grab Bar