Easy to install: The package contains screws to secure the slingshot fork and trigger. The slingshot fork can be installed with two styles of rubber bands: flat rubber band group or round rubber band group. Prevent scratches on flat rubber bands to extend their service life. Please firmly secure the slingshot fork and the slingshot trigger to avoid danger. This product includes: 1 slingshot fork, 1 slingshot trigger device, and 1 flat rubber band set.