Crimson HT4 Toggle Bolts, For use to Attaching to Metal Studs, Used as Accessory to Attach WA Shelves Directly to Drywall, Comes with 1/4 x 2 1/2" Machine Bolt, Pack of 4:
TOGGLER 1080-lb 1/4-in x Assorted Length Toggle Bolt Drywall Anchors with Screws Included (10-Pack) in the Anchors department at Lowes.com
Amazon.com: CondoMounts EDA1426 Universal Wall Mounting Anchors | Steel Stud | NO Stud | Metal Stud Anchors | TV Mount Metal Studs | Cabinets | Holds 90lbs | Includes 25 Elephant Anchor Set : Electronics
Toggle Bolts for Custom Barres Wall Mounted Bracket