Bower Pentax K mount body to Screw Mount KR PK-M42 adapter Japan

This is vintage Bower PK to M42 universal screw mount adapter. It will also work on Ricoh KR mounts. It works fine-just align the red dots and lock into the Pentax body. To remove, use a paperclip to press down the little metal tab in the slot, and gently twist and unlock. Made in Japan; good quality.