“What did Paul mean by the phrase, ‘the circumcision made without hands’?”
“And ye are complete in Him, which is the head of all principality and power: In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ” (Col. 2:10,11).
According to the Abrahamic Covenant, the Israelites were to circumcise their male children on the eighth day. Normally the father performed this procedure, which made the little one a child of the covenant. Although circumcision did not save the child, it did give him a favorable position to enjoy the blessings of God, which included salvation. With one turn of the wheel, God often accomplishes a two-fold purpose. In addition to the religious rite of circumcision, the eighth day was significant in that the vitamin K content in the blood (clotting agent) is at its highest level during a lifetime.
The circumcision “made without hands” is an operation of God. This pertains to our spiritual circumcision in Christ. In short, the Father surgically removed our sins when Christ was cut off at the Cross. An understanding of this truth will enable us to live a deeper life in Christ knowing that our sins are forgiven. source