With two-way bayonet on the back, the F22&F38 Quick Release Plate is compatible with products of both F38 series and F22 series, also with 1/4 screw for transforming the 1/4 treaded hole into bayonet for F22 or F38 series, it truly integrates the compayibilities of F22, F38 and Arca-swiss into one. The 18mm NATO clamp is designed to achieve a good horizontal expandability. And to prevent scratches, we designed the non-slip rubber pad to effectively enhance the safety of equipment.