Is it strong enough for a 250-pound adult?

Each kilo newton is 224.81 lb so with a 15-1 safety factor a 50 kn device can hold 11,240.44 lb total, that is 749 lb of load. A kernmantle rope can hold as much as 9000 lb And a 24 kn carabiner (read its rating and safety factor) can hold 5395.41 lb. So Remember you are as strong as your weakest link. Read all before you hang on a rope.

What material of it? Is it durable? I need to be safe...

It is made of aluminum. It appears to be very durable, but I haven’t used it yet. I also need it to be safe.

Does it have any international certification.. ??

It is NOT UIAA rated. I returned mine. It is also big and heavy when compared to the Black Diamond figure 8, which sells for about the same price, is UIAA rated and is smaller & lighter.

How large diameter of rope is this rated for?

The applicable rope diameter is 8-13mm.

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🧗‍♀️ Elevate your safety game with the ultimate figure 8 descender—because every second counts!

INNOVATIVE LARGE VENT EARS - Enhanced friction control lets you lock off hands easily and descend smoothly with confidence.
PREMIUM 7075 ALUMINUM ALLOY BUILD - Lightweight yet ultra-durable for long-lasting performance on every climb or rescue mission.
UNMATCHED SAFETY WITH 50 KN STRENGTH - Engineered to handle up to 5000kg, ensuring rock-solid braking power when it matters most.
VERSATILE FOR EVERY VERTICAL CHALLENGE - Perfect for rock climbing, rescue, aerial silk, and technical rope work—be ready for any adventure.
ERGONOMIC DESIGN FOR EFFORTLESS CONTROL - Thick body minimizes rope wear while the spacious slots accommodate multiple rope setups seamlessly.

The 50KN Rescue Figure 8 Descender is crafted from aircraft-grade 7075 aluminum alloy, delivering exceptional strength and durability with a maximum braking force of 50KN (5000kg). Its large vented ears increase friction for superior rope control and safe lock-off capability, making it ideal for rock climbing, rescue operations, aerial silks, and technical rope work. Lightweight at just 282g and designed for versatile use, this belay device ensures smooth, controlled descents while minimizing rope wear.

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TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

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Model Number	SMCRF1
Color	red
Size	6.7×6.7inch/17×17cm
Material	Aluminum
Batteries Included	No
Maximum Weight Recommendation	4989.52 kg
Product Dimensions	17.02 x 17.02 x 0.1 cm; 282 g

50KN Rescue Figure 8 Descenders Large Vent Ear Belay & Rappelling Gear Belay Device Climbing Rock Climbing Peak Rescue 7075 Aluminum Alloy (Red)

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