EXOS Radial Gutter Fracture Brace with BOA — Cast Splint for 2nd & 3rd Metacarpal Fractures
A reformable, water-resistant fracture brace (cast splint alternative) designed to stabilize the 2nd and/or 3rd metacarpal (MC) bones and the respective metacarpophalangeal (MCP) joints of the hand. Ideal for metacarpal fractures when immobilization is prescribed.
Why clinicians choose EXOS for radial gutter immobilization
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Thermoformable / remoldable for a custom fit during swelling changes
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BOA Fit System for micro-adjustable compression and quick on/off
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Radial gutter design supports 2nd/3rd digits and helps position MCP joints for stability
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Water-resistant & easy to clean (hand wash / dry; hair dryer is commonly used for drying)
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Radiolucent material (often allows imaging without removal, per clinical protocol)
- Not made with natural rubber latex
Indications
- Fractures of the 2nd and/or 3rd metacarpal (MC) bones
- Injuries to the respective metacarpophalangeal (MCP) joints
- Injuries requiring radial gutter immobilization per provider direction
Key Features & Benefits
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Thermoform and custom mold to the patient's extremity for a more comfortable fit
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Full hook-and-loop release ribbon allows for easier and more comfortable application, removal, and reapplication
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Dorsal hook-and-loop secure tab helps secure the overlapping (top) portion of brace for better stability
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Hook-and-loop straps across the web space and around the 2nd and 3rd digits can be attached anywhere to the surface for better stability and comfort
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Finger section can be trimmed (as directed by the physician) to accommodate desired range of motion
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BOA® Fit System provides quick adjustment in circumferential compression
Sizing & Fit (Important)
Measure first. Wrap a flexible tape loosely around the widest part of your hand (around the knuckles, excluding the thumb), then match your measurement below. If you're between sizes or want a roomier fit, size up.
How to measure
EXOS Radial Gutter Fracture Brace (BOA) — Size Chart
XS (X-Small)
Hand circumference
7¼" – < 8" (18.4 – < 20.3 cm)
Brace length
11½" (29.2 cm)
Left / Right part #
326-31-1111 / 326-32-1111
S (Small)
Hand circumference
8" – < 9" (20.3 – < 22.9 cm)
Brace length
12¼" (31.1 cm)
Left / Right part #
326-41-1111 / 326-42-1111
M (Medium)
Hand circumference
9" – < 10" (22.9 – < 25.4 cm)
Brace length
13½" (34.3 cm)
Left / Right part #
326-51-1111 / 326-52-1111
L (Large)
Hand circumference
10" – < 11" (25.4 – < 27.9 cm)
Brace length
14¾" (37.5 cm)
Left / Right part #
326-61-1111 / 326-62-1111
XL (X-Large)
Hand circumference
11"+ (27.9 cm+)
Brace length
15¼" (38.7 cm)
Left / Right part #
326-71-1111 / 326-72-1111
Fit tip: EXOS braces are heat-moldable—slightly larger can often be molded for comfort, while a too-small brace may not fit safely.
Heating & Application (Important)
Important: This brace must be heated to properly mold for best fit. Watch the videos below before fitting.
| Requirement |
Manufacturer Specification |
| Ideal Temperature |
200°F (93°C) |
| Maximum Safe Temperature |
212°F (100°C) |
| Heating Time |
Approximately 3–5 minutes |
| Working Time |
3–8 minutes before it hardens |
| Heating Method |
Convection oven or hair dryer (for small adjustments) |
| ⚠️ Warning |
Never use a microwave or high-heat industrial heat guns. |
Important: EXOS braces are intended to be fitted and remolded by trained medical professionals. Heating/molding performed outside medical guidance may affect fit, safety, and warranty coverage. Many have successfully heated these items on their own using a home oven and wrapping the brace in a damp towel, but we cannot cover this under warranty if it is not done by a trained medical professional.
Instructions
Professional Use + Warranty Note
EXOS products are intended to be fitted and molded by trained medical professionals (or under medical supervision). Heating/molding performed outside medical guidance may affect fit, safety, and warranty coverage.
By purchasing an EXOS brace or accessory, you acknowledge that you are either a qualified orthopedic technician or currently under the supervision of an orthopedic medical provider who has prescribed an EXOS product to you, and that the end-user assumes responsibility for proper use.
Shipping Note
We try to ship quickly because we know you may need this urgently. There may be a 1–2 business day delay before the item leaves the warehouse, even if expedited shipping is selected. Please plan accordingly.
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