Anderton Dolly Pin (ADP). This is a baby pin that quickly and securely locks into the 1" seat and push bar receivers on Fisher and Chapman dollies. It is based on a design by Gary Anderton, a tech for Photosonics, and made with high quality Cardellini Clamp parts. Anderton Dolly Pins are great for locking off cameras, mounting lens flags, or using as attachments to connect two dollies on track.
The lower picture shows the Anderton Dolly Pin (ADP) fitting perfectly into the support tubes of a Backstage TR-04 Camera Cart. Please note: The newer TR-04 carts have been re-designed and are compatible with the Anderton Dolly Pin.
NOTE: The Anderton Dolly Pin (ADP) is 1" in diameter and is designed to go into the dolly seat hole...it's not a 1-1/8" Junior Pin. It is intended for use in 1" holes only.