Picture Frame

What are the small pieces of metal on the back of a picture frame called?

The small metal pieces on the back of a picture frame that you can swivle up and down to "lock" and "unlock" a picture in the frame. What are those called and where would I find them? Also, are there heavy duty ones that could hold like a pound?

they are turn buttons... http://www.google.com/products?q=turn+buttons&rls=com.microsoft:en-us:IE-SearchBox&oe=&um=1&ie=UTF-8&ei=fKTpS9WiE4SClAfd0rXZCg&sa=X&oi=product_result_group&ct=title&resnum=3&ved=0CDwQrQQwAg

NASCAR PICTURE FRAME WITH CLOCK GIFT SET NEW IN BOX 19 ELLIOTT SADLER    US $7.91

FRAMED PICTURE CLOCK    US $25.00

FRAMED PICTURE CLOCK    US $25.00

FRAMED PICTURE CLOCK    US $25.00

FRAMED PICTURE CLOCK OF ELVIS    US $25.00

PARAPLUIE REVEL CLOCK PICTURE FRAMED CAPPIELLO 15 1 2    US $42.99

Ingraham Scenic Fall Country Framed Picture Wall Clock    US $35.00

Miniature Clock Collection Crome Timex Picture Frame Clock    US $23.00

Vtg Shannons Mini Goldtone Picture Frame Table Desk Clock    US $9.95

Desktop Small Working Quartz Clock Picture Frame Package w Bow on Top    US $9.95

OVAL PICTURE FRAME CLOCK WALL OR DESK STYLE HOLDS FOUR 1 1 4 X 1 1 2 PHOTOS    US $24.95

MOVADO DESK CLOCK PICTURE FRAME NIB    US $225.00

Wood Clock with Thermometer and Picture Frame    US $34.95

Working minature Sunbeam Clock Picture Frame w box    US $17.24

Miniture Clock Collection Picture Frame NC 45    US $14.45

Miniature Clock Collection Double Picture Frame Clock Elgin Quartz Clock    US $22.00

Miniature Clock Collection Best Father Picture Frame Clock Timex Quartz Clock    US $23.00

Miniature Clock Collection Silver Picture Frame Clock Timex Quartz Clock    US $23.00

VINTAGE WOOD FRAMED PICTURE WHITETAIL DEER CLOCK VINTAGE AMERICANA 1970    US $35.99

Lovely silver plated clock and picture frame from International Silver Company    US $18.00

VERY UNUSUAL MOVADO PICTURE FRAME NEW IN BOX    US $49.95

Mini Clocks I Heart U Picture Frame Miniature Clock    US $14.99

NEW ARGENTO SC PICTURE FRAME SWAROVSKI CRYSTALS    US $49.99

Mini Picture Frame And Quartz Clock in a Present    US $12.99

Photo Frame Clock Shows TIME DAY DATE TEMP 3x5 Picture Wall or Table    US $24.95

Disney Mickey Mouse Vintage Picture Frame Wall Clock    US $5.99

2 nice desk or shelf clocks one w picture frame    US $15.00

TRAVEL SMART BY FRANZUS DELUXE ANALOG ALARM CLOCK W PICTURE FRAME FLASHLIGHT    US $6.00

Bulova Ceremonial Picture Frame Table Clock    US $49.95

Call Waiting by Tom Everhart Combo Picture Frame Quartz Desk Clock    US $75.00

Bulova Reflections Picture Frame Tabletop Clock    US $119.98

MINI PICTURE FRAME AND QUARTZ CLOCK    US $19.99

SETH THOMAS Clock Picture Frame in Wooden Book Shaped Frame Never Used in Box    US $14.95

Bulova clock small with picture frame gift set    US $22.00

Nascar Dale Earnhardt Jr Picture Frame W Clock Set NEW    US $14.99

BULOVA PICTURE FRAME CLOCK 3 PICTURE FRAME WALLET LEATHER BALL STATE UNIV LOGO    US $14.99

Brass Clock Picture Frame    US $21.99

NIB BULOVA Picture Frame and Clock and Frame Wallet Leather Never Opened    US $6.99

Nascar Picture Frame with Clock Gift Set new in box 11 Denny Hamlin    US $6.99

CLASSE GOLD GIFT PRESENT PICTURE FRAMECLOCK PAPERWEIGHT GREAT GIFT IDEA    US $1.99

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