This is the best value for lightweight carabiners. It scored only a little lower than the Edelrid Pure Screw but costs much less. If we were loaded, we would go with the Pure Screw exclusively with a few Petzl Attache here and there. But if you are on a budget, or just appreciate value, then it's hard to beat this carabiner for its weight and the money. The only other sub- $8 light carabiner we tested is the Mad Rock Ultra-Tech HMS, which is much heavier.
Mad Rock Super Tech Keylock Screw Review
Cons: Does not hold many ropes, not great gate clearance.
Manufacturer: Mad Rock
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Our Analysis and Test Results
This is a very light (almost the lightest). While it is small and compact, it has an I-beam design that makes it easy to handle. It is the perfect carabiner to load up on for multi-pitch climbing because it is so light. Only a few carabiners are lighter, and it's only by a few grams.
There are no major dislikes other than that since it is a small carabiner, it doesn't have great gate clearance or hold much. It is also not good for belaying the second from the anchor.
A lightweight all around locking biner best for uses where size and weight are a key factor.
This is hands down the best value in small locking carabiners. It's the biner we load up on for trad climbing applications.
— Chris McNamara and Chris Summit