Fangrui Product Details Features: 1. The Shutter Extension Lever Can Solve The Trouble Of Moving Your Hand To The Shutter When Diving 2. Pleasant Experience, Combined With Ergonomic Design, Strives To Make The Trigger Fit Your Finger Better, And The Elevation Angle Design Does Not Slip When Underwater 3. Using The Principle Of Leverage, Pull The Tail Of The Movable Block, And Down The Front End Of The Movable Block, Because The Front End Of The Movable Block Is Equipped With A Spring, The Movable Block Rebound, And The Movement Of The Movable Block Drives The Connecting Block, Sliding Plate, And Fixed Column To Touch The Camera Shutter Button , So As To Achieve The Purpose Of Not Directly Pressing The Shutter. 4. Suitable For DSLR Camera, Such As , , , And 5. Adjustable, Shutter Extension Lever, Allowing You To Easily Control The 1. Product Type: Shutter Extension Rod Bracket 2. Material: Aluminum Alloy 3. Size: Sleeve Size: 4.5 x 6.9cm; Resistance Arm Size: 5.7 x 4.75cm 4.Color: Black Package Contents: 1 x Shu