RokStad Shooting Rifle Rest - Tripod Saddle Mount: 
 
Materials: Aluminum Alloy
Dimensions: 86x90x59 mm / 3.39x3.54x2.32 in
Clamp Width: 35-65 mm /  1.4-2.5 in
Color: Black
Weight(net): 435 g /  15.3 oz
 
Items in the Package: 1/4''- 20 Thread Bushing, 3/8''-16 Thread &1/4'' Latch Adapters.
Clamping Range from 35-65mm(1.4-2.5 in), Compatible with Most Rifles 
1/4''- 20 Thread Bushing, 3/8''-16 Thread &1/4'' Latch Adapters, Can Fit Most Tripods 
Oversized Twist-Lock Knob Offers Quick and Effortless Installation, Unparalleled Stability