【Arca-Swiss quick release plate】Straight-grain knobs (non-apron design, no idling). Compared with ordinary quick release boards, it is more slip resistant and anti-dropping. Compatible with Arca-Swiss standard quick release plate of Manfrotto be free. ※Clamping range: 40-45mm.【Build In Bubble Level】There are three levels of level included (both sides of the quick release plate & the side of the locking knob), to help you perceive your position more accurately..【Corrosion resistance & anti-skid】 The quick release plate is made of high-strength aluminum alloy material, which has undergone anodized surface treatment, which is corrosion-resistant and wear-resistant; it has a non-slip function, which can well protect the camera. ※L-shaped inner hexagonal small wrench is included. The design is simple and light. Both ends of the (wrench) can be used..【With ruler & 3/8 to 1/4 screw】you can use the attached 1/4 screw to directly connect to a tripod/monopod for indoor and outdoor photography..【Size & Product List】1xMount:7.6x5cm,1xQuck release plate:3.7x5cm,1xHexagon wrench. Please look carefully that the size suits yours.