Compasses

The utility model relates to a pair of compasses. The pair of compasses comprises a handle and a revolving shaft, wherein the handle is arranged on the revolving shaft; two support legs extend downwards from the revolving shaft; the bottom of one of the two support legs is connected with a friction block; the friction block is rotationally connected with the support leg; a pen point is arranged on the other support leg; the friction block is a hemispherical friction block; the plane of the hemispherical friction block is provided with a plurality of friction nails, and faces downwards; the arc surface of the hemispherical friction block is provided with a stepped blind hole which is rotationally connected with the support leg; a corresponding support leg is provided with a rotating shaft; a connecting part of the rotating shaft is stepped, and is rotationally matched with the stepped blind hole. The friction block is static relative to paper during use, the support leg connected with the friction block can rotate freely relative to the friction block, and the rotatable support leg can be used for freely drawing a circle on the paper, so that the completeness of the drawn circle is ensured, and the paper is prevented from being damaged.