Really Right Stuff BH-40 Ball Head 40mm/4.6in Clamp BH-40-SCR - Open Box Item is pre-owned, shows little to no wear, comes with what is shown on images. May show signs of dust, no cosmetic damage is visible. Has not been tested. We believe these are the items features, unsure of exact items specifics: Features of the BH-40 Ball Head: 90 Drop Notches ? Maximum flexibility for positioning the rifle into any angle Dedicated Pan ? Precision panning base is laser-engraved at 2.5 intervals Unique drum and brake design ? easy Locking R-Mount Interface ? Patent-pending design provides secure connection between clamp and ball stem head. Rosette design prevents twisting at the coupling point between the two pieces of hardware over time, helps eliminate the ?play? resulting from regular use on previous RRS tongue-and-groove designs Dual Clamp Design Easy Top-Loading Function ? Compatible with RRS 1.5? dovetail, ARCA-Swiss rails, and picatinny rails We appreciate your interest, we try our best to show actual images of the item and list with an accurate description! Please view images carefully and see description for more details or contact us for further information. Our goal is to achieve our costumers satisfaction by providing quality products in a timely manner. Thank you !! :)