Manufacturer - Distributor of Calslock and Thumbsquare products since 1985.

Thumbsquare gets it's name from the way the clip is used.
Insert thumb in square and press on oval to clip.Thumbsquare Logo

Calslock and Thumbsquare available at: Amazon - Ebay - Etsy - Corporate Travel Safety - Sears - and online
 Shown Thumbsquare Sterling Silver Money Clip  Calslock w - Stainless Steel/Brass Slide. Calslock Portable Door Lock

Patented under the following numbers: 5,676,243
4,976,124- 4,658,479- 4,612,685- D302,280.
with others pending
©1985-2018 C.E. Sanders
Calslock™ mfg.
Thumbsquare logo Hawaii Hula

Mims, FL - Keaau, Hawaii - Corcoran, CA