Rycote PCS-Boom Quick Release System
The PCS-Boom Quick Release System from  Rycote is a simple 'click-in' attachment mechanism that offers a strong and noise-free boom connector for professional boompole operators. It features universal 3/8"-16 compatibility. Attachments include the PCS-Boom socket and a 3/8"-16 quick release tip.

Specifications:
Compatibility Universal 3/8"-16 Attachment 
Dimensions Not Specified by Manufacturer 
Weight 1.87 oz / 53.01 g (Connector + Tip)