I'm looking for a few three piece type lower shaft cam-locks (pole-lock). I'd prefer the Tesoro over the Whites. Other brands could work if it's heavy duty and quality made. The application is for a custom made water detector straight shaft with a 7/8" OD which will accept a Tesoro, White's, or Excalibur size lower shaft. Please PM me if you have something you think might work. Thanks.