Here's what other sites are saying:
The HMS Twist Lock Carabiner with an automatic twist lock closure. Smooth operating, super strong D carabiner with a keylock closure to reduce snagging. A great choice for serious mileage.
Camp USA HMS Twistlock Carabiner (Fall 2009) The HMS Twistlock Carabiner by Camp USA is an auto-locking HMS carabiner. Double-action twist lock sleeve is easy to engage with one hand. Specifications: kN Major: 22 kN kN Minor: 9 kN kN Open: 7 kN Gate Opening: 23 mm Weight: 102 g, 3.6 oz
Set up for a smooth, safe belay with the CAMP USA HMS Twist Lock Carabiner. The medium-sized pear shape enables a variety of uses from fast sport belays to aid-climbing rigs. The twist-and-lock mechanism prevents accidental openings but is simple enough to open with one hand, and the rounded basket feeds rope smoothly as your partner sends.
CAMP Steel D Twist Lock
CAMP Steel Oval Twist Lock
Mammut Crag Indicator Express Set
$15 - $94
Trango Smooth Quickdraw
Singing Rock Porter Racking Biner
Kong D Shape Quicklinks
CAMP Photon Mixed Express Nylon Quickdraw
CAMP Nano 22 Express KS
$14 - $17