Lock On Strap On Harness Black from Blush Novelties. Features built in lock on attachment. Compatible with all lock on dildos. Customized. Fully adjustable thigh and waist straps. Stimulating. Features a pocket to hold the bullet vibrator, included. Peace of mind. Made of safe materials: Nylon straps with nickel free buttons, Polyester pouch. Size fits Up to 60 inches waist line. The Lock On O-Ring Harness is sexy, comfortable way to expand your strap on options! Its nylon straps are adjustable to fit around up to 60 inches waists. The Lock On attachment holds any Lock On compatible dildo securely in place during even the most vigorous play. Plus, this lovely harness includes a pocket that holds an optional vibrating 1 speed bullet, adding extra sensation for the harness wearer. Vibrating bullet included, requires 1 AAA battery, not included.