The present invention relates to a device for circumcising a penis characterised by: a primary ring (100) including an anterior end (101), a posterior end (102), and a plurality of indentations (103) on the anterior end； a tubular member (200) including a plurality of protrusions (201) for maintaining a foreskin of the penis in a proximal position； wherein the tubular member (200) is configured to be received by the anterior end (101) of the primary ring (100)； a locking ring (300) including a plurality of projections (301) configured to engage with the 300 plurality of indentations (103) for securing the foreskin against the primary ring (100)； and a cover ring (400) for tightening the locking ring (300) on the primary ring (100).
