This kit comes with the C300/C500 Helmet, a 3" Z-Rail and the QR Tapped Handle. The C300/C500 Helmet is a mini cage designed to mount directly to the top of the C300 or C500 in place of the Canon top handle. It gives you multiple ¼ 20 and 3/16 mounting screw holes to which you can securely attach a variety of accessories, Z-Rails, the C300/C500 Tapped Handle, or the C300/C500 Coldshoe Handle. The Helmet attaches to the camera via one screw on top and 2 additional screws on the sides, mounting it firmly in place. Longer screws for attaching the Helmet to the camera body are included. The two film plane screws must be removed from the camera, but can be screwed into the Helmet, maintaining their original position.
The QR Tapped Handle is a quick release handle that will work with any Z-Rail to give you a top handle with two ? 16 screw hole mounts. The screw holes can accept a ¼ 20 using a brass collet. The top handle itself is hand tooled fine three quarter maple.