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Metolius Ultralight Master Cam 1
  • Metolius Ultralight Master Cam 1
  • Metolius Ultralight Master Cam 1
  • Metolius Ultralight Master Cam 1
  • Metolius Ultralight Master Cam 1
  • Metolius Ultralight Master Cam All Sizes

Ultralight Master Cam 1



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The Master Cam is a flexible, single-stem unit with an optimized cam angle for increased holding power. The new Ultralight Master Cams are twenty percent lighter than the originals. If you carry a double set of cams, the weight savings is the same as a twelve ounce canned beverage of your choice. When compared to other brands, the weight savings can be much more. The new shark fin tooth pattern gives optimized bite in soft rock.

10 sizes: #00 - 8, sizes 7 and 8 are new and very light for their size.
Slings are replaceable, and should be replaced every five years or earlier.
Color-coded 11 mm Monster sling, thumb piece and trigger.
Range Finder system assists you in choosing the correct size cam.
CNC machined for much greater precision than stamped or extruded cams.
100% made in the USA.
Individually proof tested.

Retail price

US$ 59.95

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Weight (g / oz)

Weight (g / oz)

In grams and ounces, the weight, as stated by the manufacturer/brand.

52.0 g / 1.80 oz
Cam Head 4 lobes, single axle
Offset No offset
Stem Flexible single stem
Sling ­x11 mm Nylon / Polyamide (single loop)
Camming Angle ­
Active Strength 8 kN
Cam Range (mm / in)

Cam Range (mm / in)

In millimeters and inches, the maximum dimensions of the cam lobes when shut tight and fully extended. Since the "usable" range is so debatable, all manufacturers now list the full dimensions to avoid confusion.

If a manufacturer lists the usable range, we'll include it here as well (this is now very rare).

Total dimensions
13 mm x 18 mm / 0 in x 1 in­­­­
Materials ­
Certification UIAA, CE
Ultralight Master Cam (Updated)
Ultralight Master Cam Details
Cam Maintainance

Beth Rodden shows you how to inspect and maintain your cams.

No reviews yet.

Alpinist Gear Review rating 4/5

Over several months of testing—let's just call it climbing—from the sharp cracks in Vermont's crags to the sustained splitters in New York's Adirondacks (ADK) to Boulder, Colorado's smooth granite, these svelte units performed as well as single-axle cams are expected to. They're also very flexible, which helped me wiggle them into placements, and they were generally easy enough to clean.

WeighMyRack Gear Review in-depth technical review

Metolius Ultralight Master Cams are crazy light. If you’re going for the lightest protection around then you’ve found your match. The loss of the thumb loop will be mourned by many, but such are the sacrifices necessary for a 20.8% weight reduction. The added sizes really round out the lineup with an added bonus of no change to the price, despite the additional R&D required to get them to market.

Blister Gear Review no rating given just a review

The Metolius Ultralight Master Cams are sleek, burly, and very slim. While they have a lot to offer, much of your opinion of the updated versions will depend on how strongly you feel about having a thumb loop on your cams. If you are an alpine climber for whom weight and size are primary concerns, or you are looking for a complementary set of cams, the Ultralight Master Cams offer a compelling choice in the weight and size department.

Climbing Gear Review no rating given just a review

The lifelong climbers at Metolius do things their own way. Always have, always will—and that’s why we love them. Their newest hot item is the Ultralight Master Cam, 20% lighter than the previous iteration. That’s six ounces of savings per complete rack. How’d they do it? They did away with the swage and cable thumb loop design that most camming devices use and instead employ a machined piece of aluminum with built-in 11mm webbing (which Metolius recommends replacing every 5 years). Designers also removed unnecessary material in the trigger and cam lobes. What remains is a flexible, single-stem cam with a new shark fin tooth pattern and color-coded range finder to ensure proper placement. “The action was really smooth, and I had reliable, solid placements with every type of fissure and pod—and a lighter pack to boot,” exclaimed one Eldorado Canyon, Colorado tester. Brownie points: It is all made right here in the U.S.A.

Climbing Report Gear Review no rating given just a review

Our testers took a few falls on these new cams, no really big whippers, but the falls held well with the new cam designs on these Ultralight Mastercams. The overall impression is that the new work as well, or better than the old. The standard Mastercams worked great so it’s had to tell if the new actually work better or not. What do know is that even if performance is the same you’re dropping a lot of weight with a new set of Ultra Light Mastercams and lighter weight, especially when multiplied across a rack on your harness, is a big deal. Sizes range from #00 to #8. We tested sizes 5, 6, 7. We’re stoked on these new Ultralight Mastercams and think they definitely deserve a look from you.

The UIAA equipment standard provides a baseline for equipment performance in a test lab under controlled conditions on new equipment. Although these test conditions are relevant to the conditions encountered climbing, conditions encountered at the crags and the condition of the equipment are equally important. This recommendation from the UIAA member federation The British Mountaineering Council (BMC) provides vital equipment information that is NOT explicitly addressed in the standard, particularly failure modes of the equipment and recommendations for the use, inspection, maintenance, and retirement of equipment.