Shape

Shape RODSUP4 Rod Bloc 15mm LWS Accessory Mount

A CNC-machined aluminum rod block that clamps to 15mm LWS rods and adds both 1/4-20 and 3/8-16 threaded mounting points to your rig

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Overview

SHAPE's Rod Bloc is the kind of unglamorous but high-value rigging piece that quietly cleans up a camera build. Its job is simple: clamp onto a 15mm LWS rod and provide threaded mounting points for monitors, handles, follow-focus accessories, or ancillary support gear. By offering a 1/4-20 and a 3/8-16 hole in the same block, it covers the two industry-standard accessory threads without forcing you to pre-plan which size you'll need. Anyone running a mirrorless or small-cinema camera on a 15mm rod system will recognize the use case immediately.

Construction is CNC-machined aircraft-grade aluminum, which keeps the piece stiff under load while staying light enough not to upset the balance of a handheld or gimbal-mounted rig. The design is intentionally minimal — no rosettes, no articulating arms, just a clamping block with threaded holes — and that simplicity is part of its appeal. For operators who want to anchor a single accessory cleanly, without the cost or bulk of a full arm or multi-position bracket, it's a targeted solution. Buyers on 19mm studio rod systems will need to look at SHAPE's other blocks, since this one is scoped specifically to the 15mm LWS standard.

Key Features

For 15mm LWS Rods

Single 1/4"-20 Threaded Hole

Single 3/8"-16 Threaded Hole

CNC Machined Aircraft Grade Aluminum

Specifications

Brand
SHAPE
Manufacturer
SHAPE WLB
Rod Compatibility
15mm LWS rods
Threaded Hole 1
Single 1/4-20
Threaded Hole 2
Single 3/8-16
Material
CNC-machined aircraft-grade aluminum

Pros & Cons

👍 Pros

  • Machined from aircraft-grade aluminum, so the block is light on a rig without feeling flimsy when you torque down accessories
  • Pairs a 1/4-20 and a 3/8-16 threaded hole in one block, covering the two most common accessory thread sizes on set
  • Designed for the 15mm LWS rod standard, which is the dominant cage-and-rod format for mirrorless and small cinema cameras
  • Dedicated rod block is simpler and lower-profile than adapting a rosette arm or multi-joint mount for a single accessory

👎 Cons

  • Only compatible with 15mm LWS rods, so 19mm studio rod rigs need a different block or a step-up adapter
  • Single hole per thread size limits how many accessories you can anchor to one block simultaneously
  • No built-in anti-rotation or safety pin — operators relying on heavy accessories may want a redundant secondary mount
  • Aluminum construction can mar or scratch rods if the clamping screw is overtightened during a fast rig change

Frequently Asked Questions

No. The Rod Bloc is specified for 15mm LWS rods only. A 19mm studio rod system needs a different block or a 19mm-to-15mm rod adapter for compatibility.
Yes. The block has one 1/4-20 and one 3/8-16 threaded hole, so two accessories with different thread standards can be mounted to the same block simultaneously.
The block is CNC-machined from aircraft-grade aluminum, which is the standard material for this class of rig accessory. For very heavy loads, supporting the accessory with a second mounting point is best practice.
The product description lists only the threaded holes — no integrated locating pins are specified. Accessories that need anti-rotation will rely on friction from the threaded fastener and mating surface.
Yes. Aluminum construction keeps the block lightweight, which matters on gimbal and handheld rigs where every gram affects balance and battery life.