Composite Bow and Arrow Release, 3 or 4 Finger Hand Held Grip, Thumb Release Aluminum Alloy Assist for Compound Bow Accessory, Adjustable Sensitivity, Sports Competition. … 

• Archery pull release--Archery release aids and adjustment tools.Flexible switching between 3 or 4 finger.The Releaser Sensitivity can be adjusted by Wrench. Perfectly improve the accuracy of hitting the target.Arrow release for compound bows，backup release in your hunting package. 
• Release Aid--thumb button has a concave-convex design, it can effectively prevent slippage. Compact and Lightweight, Convenient to Carry, Hard Oxidation Treatment, Built-in Safety Device.The factory test easily bears 70 pounds. 
• Clamp head--360°rotation of the clamp head，adopt a hook-shaped design,which has a smaller contact surface with the bowstring and higher archery accuracy，reduces the wear of D loop rope.The action of the thumb button is smooth. 
• Bow Releaser--Perfect to Improve Your Bow Shooting Accuracy，thumb release archery， Good Operation, No Hand Injury，All ages and perfect for the new or experienced archer.

NO  instructions included

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