Feature A Fine Adjustment with QR Lever Lock, Allowing Fast Locking and Instant Release for Precise Positioning A Versatile Rotation Feature, Support 360Adeg Horizontal and 135Adeg Drop-Notch Vertical Rotation Movement A Dual ARCA-Type and Picatinny Rail Interfaces, Compatible with Rifle Chassis and AR Handguards A Stable Tripod Head, 55 mm Diameter Ball Head, Max Load 30kg (66lbs), Fit for RSCF-T02 and RSCF-T03 Tripod Specification Specification Details Material: 6061-T6 Aluminum Alloy Base Mount: 3/8&';&'; Threaded Socket Ball Diameter: 55 mm / 2.17 in Base Diameter: 71 mm / 2.80 in Height: 127 mm / 5.00 in Weight: 886 g / 31.25 oz Max Load: 30 kg / 66 lbs Items in the Package: Hex Key, Quick Release Plate, D900 Storage Bag, etc. Size Download RSRH-03 RoKstad 55mm Quick Stop Ball Head User Manual