25kN UIAA D-Shape Screw Lock Carabiner Pack of 5 - Heavy Duty

Our review of the 25kN UIAA D-shape screw lock carabiner pack finds these clips best for climbers, arborists and aerial workers who want a certified, compact connector that balances strength and low weight. The single biggest reason to buy is the UIAA certification paired with a 25kN major axis rating, which gives confidence for critical connections while keeping the hardware small at under 3.0 in long and roughly 2.2 in wide. This review looks at build, usability and real-world value based on the supplied specs, certification and customer feedback.

Key Features

• UIAA Certified: The carabiner carries the UIAA certificate (CHN 21-6106), offering verified load performance for climbing and rescue use.
• High Strength Major Axis: A 25kN major axis rating places the majority of load along the spine, providing reliable strength for belays and anchors.
• D-shape Design: The classic D shape directs load to the spine so pulleys, descenders and belay devices sit where the metal is strongest.
• Screw Lock Mechanism: The screw lock is easy to operate with one hand and includes a safety gap so the nut can be opened in an emergency without jamming.
• 7075 Aviation Aluminum: The alloy keeps the carabiner compact and lightweight at about 63 g while remaining durable for outdoor use.
• Pack Contents and Support: The set includes five D-type carabiners, a detailed 40-page manual and a 30-day return policy plus 90-day refund for quality issues.

Who It's For

These carabiners suit sport climbers, mountaineers, arborists and rope-access technicians who need a certified locking connector that is light enough to carry all day yet rated for demanding loads. The D shape and 25kN major axis make them particularly suitable for connection to belay systems, pulleys, descenders and lanyards.

They are less appropriate for those who require a nonlocking quickdraw-style carabiner for fast clipping or for users who need stainless steel hardware for constant marine exposure; customers did note good water resistance in some cases but the alloy is 7075 aluminum, not stainless steel.

Pros & Cons

Pros

• UIAA certification gives verified performance for critical use.
• Lightweight 7075 aluminum construction without sacrificing strength.
• Reliable screw lock with safety gap for emergency opening and one-handed use.
• Well suited to belay and pulley connections thanks to the D-shape.

Cons

• 7075 alloy can show wear over long-term marine exposure compared with stainless steel alternatives.
• Gate opening size and D shape may be less convenient for rapid clipping in some sport climbing scenarios.

Specifications

Certification	UIAA (CHN 21-6106)
Major axis strength	25kN
Minor axis strength	7kN
Open gate strength	8kN
Material	7075 aviation aluminum
Length x Width	3.93 in x 2.20 in
Weight	2.2 oz (63 g)

Our Verdict

The 25kN UIAA D-shape screw lock carabiner pack is a solid choice for climbers and professionals who need certified performance in a lightweight package; it combines a trustworthy screw lock, proven D-shape load routing and durable 7075 aluminum at a sensible value. Buy this set if you want certified connectors for belays, pulleys and work positioning and appreciate a compact, lightweight tool that customers report performs reliably.

Frequently Asked Questions

Are these carabiners certified for climbing?
Yes, they carry UIAA certification (CHN 21-6106) and are rated 25kN on the major axis, suitable for climbing and rescue connections within normal use.

Can the screw lock be operated one-handed?
Yes, the screw lock can be opened and closed with a single hand and includes a safety gap so the nut does not jam in an emergency.

How many carabiners come in the pack?
This listing supplies five D-type heavy duty carabiners along with a detailed manual and customer support for returns and quality refunds.