Field Optics Research Arca Swiss Twist Clamp (Round)

This round Arca Swiss Twist Clamp from Field Optics Research attaches directly to any 3/8"-16 thread stud, whether it be a bowl disk, trekking pole, or tripod center tube. It includes two spirit bubble levels, one for horizontal and one for vertical, as well as two graduation scales. The base has a 2.55" OD base diameter with dual Arca travel retention slots and an anti-rotation jam nut. The maximum width including knob and level is 3.8". This clamp includes a 1.9" QR plate with dual retention pins.