Installation burglary -resisting window fastener for special screw

The utility model relates to an installation burglary -resisting window fastener for special screw, including first fastener, second fastener, cover and ring sum socket columns, the cross -section of first fastener and second fastener is the half circle ring structure, respectively is equipped with a joint arch on two sides of first fastener, respectively is equipped with a joint recess on two curb plates of second fastener, and first fastener and second fastener pass through the protruding mating reaction with the joint recess of joint and form a complete cross sectional shape for doughnut -shaped structure's fastener main part, first fastener respectively is equipped with a fastening picture peg with the bottom of second fastener, and the slope of fastening picture peg sets up, fastening picture peg one end is equipped with the fastening recess, and the fastening recess agrees with with the fastening terminal mutually, design benefit, and the practicality is strong, can the wide application, must just can o