1. Made of high strength alloy steel, unbreakable and wearable, safe and reliable to use.2. The blocking tooth has a reverse grip force, which can smoothly pass the rope when it is up, and can not move downwards.3. The link hole of the A type is designed with a push-type hanging point, which makes the connection operation easier.4. The connection of the B type is a round hole design for connecting the protector through the main lock.5. Suitable for fire rescue, climbing, high-altitude operation, engineering protection, etc.Spec:Features:Made of high strength alloy steel, unbreakable and wearable, safe and reliable to use.The blocking tooth has a reverse grip force, which can smoothly pass the rope when it is up, and can not move downwards.The link hole of the A type is designed with a push-type hanging point, which makes the connection operation easier.The connection of the B type is a round hole design for connecting the protector through the main lock.Suitable for fire rescue, climbing, high-altitude operation, engineering protection, etc.Specification:Material: Alloy SteelApplicable rope diameter: 8-16mmOptional Type: Push-type, Round holeSize(Push-type):Approx. 17 x 7 x 2cm / 6.7 x 2.8 x 0.8inSize(Round hole):Approx. 15 x 6.7 x 1.9cm / 5.9 x 2.6 x 0.7inWeight: 540g / 19.0oz(Push-type) 470g / 16.6oz(Round hole)Package list:1 x Climbing Descender