1. When you pull the trigger, the steel column will auatically open, effively reduce friction, improve ing accuracy.< />2. accurate and durable.< />3. Easy to use and install.< />4. Great tool to h your ing and release your .< />5. improve flight and accuracy.< />Use: Other< />Model Number: Slingsho Release Device< />Type: Bow & Arrows Set< />Weight: . 240g< />colour:< />Material:stainless steel< />< />Package Conten:< />1 X Slingsho Release Device< />8 X Screws< />Only the above package content, other produc are not included.< />Note: Light reflion and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.