Here are the detailed specs & summary for the Tether Tools Rock Solid Master Clamp (RS220), 0.5‑2.1″ Range:
🔧 Key Features & Specifications
| Attribute | Details |
|---|---|
| Model / SKU | RS220, “Rock Solid Master Clamp” B&H Photo Video+2Polyline+2 |
| Clamping Range | 0.5 to 2.1 inches (≈ 1.3 to 5.3 cm) for round or flat surfaces Polyline+2B&H Photo Video+2 |
| Load Capacity | Up to 33 lb (≈ 15 kg) B&H Photo Video+2Rubber Monkey+2 |
| Weight | Approx 1.15 lb (≈ 0.52 kg) bukeyfoto.com+1 |
| Materials & Finish | Durable cast alloy (metal body), non‑reflective black finish. Polyline+1 |
| Handle / Mechanism | Lift‑ratchet style metal handle: easier tightening, even in tight spaces. B&H Photo Video+1 |
| Mounting / Threads / Sockets | • 5/8″ (16 mm) “Baby” socket (receiver) for accessories. • Includes a 5/8″ Baby stud with 1/4‑20 male thread. • Built‑in 1/4‑20 female threads for smaller arms. • A wedge insert included for flat surfaces. Polyline+2Adorama+2 |
| Included Items | The clamp itself, wedge insert for flat surfaces, 5/8″ Baby stud with 1/4‑20 male thread. B&H Photo Video+1 |
| Warranty | Limited lifetime warranty under Tether Tools’ policy for manufacturing defects. Adorama+1 |
✅ Use‑Cases and Advantages
Great for mounting lights, arms, monitors, or other grip gear to tables, poles, shelves, or other rigging surfaces where you can clamp between 0.5–2.1″.
The Baby socket + stud + 1/4‑20 threads make it very flexible to attach a variety of accessories in a solid way.
The wedge insert helps when clamping on flat surfaces, preventing slipping or uneven grip.
The ratcheting-style metal handle helps in tighter spaces where you can’t swing a big lever.
⚠️ Things to Note / Limitations
The clamp’s full strength (load capacity) likely depends on properly using the flat clamp accessory, even pressure, and what you are clamping onto. Very uneven or soft surfaces might reduce reliability.
At the top end of the clamp range (≈ 2.1″), leverage might make tightening more difficult; also the grip might be less rigid than when clamped on smaller diameters.
When mounting heavy gear at extended distances (i.e. arms sticking out), be mindful of torque on the clamp and the clamped surface.