This lever replaces the thumbnut on pivoting bipods to make locking them down easier. With the Alpha-Bravo unit installed, a quick flip of the lever allows you to go from easily tiltable to completely locked down, so you can get on target quickly and easily and be rock solid once you're there.Spacer Thickness:Harris Models: 3/16" Caldwell Models: 11/32"Thread: 10-32Handle Lengths:Caldwell XLA Pivot Model: 2-1/8" Harris S Model Short Angled Zinc: 1-1/2" Harris S Model Long Angled Zinc: 2-1/8" Harris S Model Long Straight Zinc: 2" Harris S Model Long Angled Polymer: 2-1/4"FeaturesAdjustable ratchet lever Matte finish Includes an exclusive spacer for stability that is black oxide coated for corrosion resistance Spacers are designed specifically to fit a brand of bipod, as there are small differences in the manufacturer's specifications Each spacer is designed to ensure a tight, stable lock-up and to be rugged and secure