A great accessory of the Katana SMS is the Katana Butt Plate. Secure and easily access your sidemount tanks or bailout, deco cylinders or other accessories. Or choose to to use it with other backmount harness systems. The SMS Katana Butt Plate includes 2 x stainless steel book screws so you can easily secure the Butt Plate to your existing Katana Sidemount system, and also includes a webbing attachment point so you can simply thread the waist strap through the upper webbing loops to securely attach.