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Really Right Stuff B2-Pro-II 60mm Screw-Knob Pro Clamp

BH #REB2PROII • MFR #B2-PRO-II
Really Right Stuff B2-Pro-II 60mm Screw-Knob Pro Clamp
Key Features
  • Captive Screw Knob with Safety Stop
  • Arca-Swiss Style QR Plate Compatible
  • Safety Stop Relief Grooves
  • Precision Bubble Level
The B2-Pro-II 60mm Screw-Knob Pro Clamp by Really Right Stuff is compatible with most Arca-Swiss style camera plates, camera bars, and multi-purpose rails. It features a captive knurled knob for a better grip when applying clamping pressure, plus safety stop relief grooves to prevent plates with safety stops from accidentally slipping out when loosened. The integrated bubble level ensures precise horizontal orientation. The top of the clamp features three threaded counter-sunk sockets, which accept 1/4"-20 and metric 6 (M6) threaded screws for mounting to a ball head stem. The outer sockets are spaced 30mm apart. The center 1/4"-20 socket is also threaded 3/8"-16 on the bottom to allow it to mount from beneath to a 3/8"-16 male stem.
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Really Right Stuff B2-PRO-II Overview

  • 1Description
  • 2Compatibility
  • 3Multiple Mounting Options
  • 4Laser-Engraved Scale
  • 5Precision Bubble Level

The B2-Pro-II 60mm Screw-Knob Pro Clamp by Really Right Stuff is compatible with most Arca-Swiss style camera plates, camera bars, and multi-purpose rails. It features a captive knurled knob for a better grip when applying clamping pressure, plus safety stop relief grooves to prevent plates with safety stops from accidentally slipping out when loosened. The integrated bubble level ensures precise horizontal orientation. The top of the clamp features three threaded counter-sunk sockets, which accept 1/4"-20 and metric 6 (M6) threaded screws for mounting to a ball head stem. The outer sockets are spaced 30mm apart. The center 1/4"-20 socket is also threaded 3/8"-16 on the bottom to allow it to mount from beneath to a 3/8"-16 male stem.

Compatibility
  • Really Right Stuff ball heads
  • Arca-Swiss current model ball heads
  • Manfrotto 468 ball head
  • Manfrotto 468RC2 ball head
  • Manfrotto 488RCO ball head
  • Manfrotto 469 ball head
  • Manfrotto 469RC ball head
Multiple Mounting Options
Featuring one threaded 3/8"-16 recessed center socket flanked by two threaded 1/4"-20 recessed center sockets, the RS-Pro-II can be mounted from beneath directly on a tripod head platform, or from above using 1/4"-20 or M6 screws
Laser-Engraved Scale
For precise, repeatable setups
Precision Bubble Level
Incorporated spirit bubble level ensures proper horizontal orientation
UPC: 818413023062

Really Right Stuff B2-PRO-II Specs

Assembly
Locking MethodScrew Knob
Clamp Range2.36" / 60.00 mm
Assembly DimensionsW: 4.4 x H: 1.0" / W: 112.0 x H: 25.0 mm
General
Quick Release TypeArca-Type
Tripod Mounting Thread1 x 3/8"-16 Female
2 x 1/4"-20 Female
Leveler1 x Bubble Level
MaterialAluminum
Weight4.4 oz / 125 g
Packaging Info
Package Weight0.31 lb
Box Dimensions (LxWxH)4.95 x 4.1 x 1"

Really Right Stuff B2-PRO-II Reviews

Best clamp available

By Frederick V
Rated 5 out of 5
Date: 2021-11-01

Best clamp available. The quality is worth the price.

Screw-Knob

By Brian
Rated 5 out of 5
Date: 2021-02-07

I'm a huge fan of the RRS quick release clamps and wanted to pickup a screw-knob version. The knob is smooth to turn and easy to operate. RRS for the win!

Worked Great for my Crane 3s

By Cindy
Rated 5 out of 5
Date: 2020-09-08

I bought this to work with my Nikon z6 and my crane 3S. I have my Z6 on a RRS plate and hated having to take it off every time I used my gimbal. This fixed that problem and holds the camera really good. Now all I have to do is line the marks up and I am ready to go.

Much better than the quick release

By Guy
Rated 5 out of 5
Date: 2021-03-19

The quick release grips aren't strong enough to retain the heavier lenses. The quick release has real problems with vertical macro pictures.

Great Quality

By Christopher
Rated 5 out of 5
Date: 2021-02-15

I have yet to find a Really Right Stuff product that is not well-designed and of exceptionally high quality. I have several of these clamps for my RRS ball heads.

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Thank you everyone for your response. But I'm ...

Thank you everyone for your response. But I'm still wondering: if I mount this on a flat surface, and that surface extends out past the bottom of the clamp (not to the knob, of course), does the diameter of the shaft allow for clearance so the clamp sits firmly on the flat surface? Sometimes I use clamps on something other than ball heads. Thanks again.
Asked by: John
Yes, the bottom surface of the Really Right Stuff B2-Pro-II 60mm will seat flat on the camera support plate system similar to BH #PLPMPMT1009. However, the knob can not be under the same plate surface because it's larger than the clamp high. The knob is 25mm while the plate is only 18mm. I will recommend the BH #REB2LRII with the Level since this part is the same high as the clamp and won't interfere if you place your plate on a flat surface.
Answered by: llinelva
Date published: 2021-10-22

Does the diameter of the shaft extend below the ...

Does the diameter of the shaft extend below the bottom plane, like some of the cheaper clamps that people have complained about?
Asked by: John
The Really Right Stuff B2-Pro-II 60mm Screw-Knob Pro Clamp (B&H# REB2PROII) is made with exacting precision and it will fit the intended heads without having any problem like the one you mentioned: Really Right Stuff ball heads Arca-Swiss current model ball heads Manfrotto 468 ball head Manfrotto 468RC2 ball head Manfrotto 488RCO ball head Manfrotto 469 ball head Manfrotto 469RC ball head
Answered by: Yoni
Date published: 2021-10-19

What's the distance between the two outer ...

What's the distance between the two outer mounting holes? I wanna mount this plate on a 322 ball head.
Asked by: Juano
The two outer mounting holes on the RRS B2-Pro II 60mm Screw-Knob Pro Clamp are 30mm apart.
Answered by: Kirk
Date published: 2022-04-26
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