The adapter plate attaches to the rear of the camera to support it on the baseplate.  The 15mm rods allow you to mount additional accessories like a matte box and follow focus. The push-button handle attaches to the baseplate and can rotate using the rosette joints for the most comfortable position.

What's in the box
(1) Shoulder Mount Baseplate (BP20)
(1) adapter plate
(1) top plate
(1) Left handle with Arri rosette and Push-Button
(1 pair) 15mm 8” rods
(2 pairs) 15mm 4” rods

Canon C500 Mark II, C300 Mark III V-lock quick release baseplate (C52BP)

Canon C500 Mark II, C300 Mark III adapter plate (C52AP)
The Canon EOS C500 Mark II Adapter Plate let you quickly attach your camera to your rig. The position of the captive screws perfectly matches the threaded holes of the Canon EOS C500 Mark II camera base.

Canon C500 Mark II, C300 Mark III top plate (C52TP)
Lightweight and robust CNC machined aluminum top plate designed to fit with the native Canon EOS C500 Mark II top handle. The top plate offers 1/4-20 and  3/8-16 threads with Arri standard anti rotating holes, which can be used to attach options around the camera. The top plate comes with a 3/16’’ Hex wrenche and (4) captive screws ¼-20 3/8 to attach the top plate to the camera
Top side: (8) ¼-20 and (2) 3/8-16 threaded holes with Arri anti rotating holes
Top side: (18) ¼-20 threaded holes
Sides: (10) ¼-20 threaded holes with Arri anti rotating holes

DOUBLE QUICK HANDLE ARRI ROSETTE SINGLE SHADOW (HAND2S)
Left or right ARRI Rosettes handgrips that can be attached to cameras or camera support hardware that has standard ARRI rosettes. The arm features three points of articulation (2 Push-button, 1 ratchet knob) allowing you to adjust the arm for your comfort. The arm attach to your camera or support via an ARRI compatible rosette with spring-loaded locking levers, which allow you to lock your arms in place. The arm is also designed with (2) ¼-20 and (2) 3/8-16 threaded holes with locking attachment stoppers for additional mounting options and to strongly secure the camera accessories in position. SHAPE is well known for its patented Push-button handle, now used by so many professionals in the industry. The technology was developped to give filmakers quick and easy adjustment. By simply pressing the button, you are allowed a 360-degree rotation to place the handle in the best position for your use. The Push-button system on the Handle articulating joint provides additional articulation near the rosette, while a second push-button articulation joint allows you to rotate and precisely position the rubber handgrips.

15 mm 8 in rods (15TUBE8)
One pair of SHAPE 15-mm aluminum rods for your compatible camera rig. Mount any 15-mm compatible accessories and form the support structure of your rig.
15-mm diameter
8-in length
Hollow, non-threaded
Tapered ends for easy connection to a rod block
Aluminum coated with a clear finish

15 mm in rods (15TUBE4)
One pair of SHAPE 15-mm aluminum rods for your compatible camera rig. Mount any 15-mm compatible accessories and form the support structure of your rig.
15-mm diameter
4-in length
Hollow, non-threaded
Tapered ends for easy connection to a rod block
Aluminum coated with a clear finish