For Sport, Traditional, And Top-Rope Climbing, Petzl Offers, Assisted Blocking. Product Features 100% Aluminium Imported PROGRESSIVE DESCENT CONTROL: 3:1 mechanical advantage of the camming mechanism helps smoothly control the rope and reduce lowering efforts regardless of rope diameter. CAM-ASSISTED BLOCKING: Cam-assisted blocking ensures a comfortable belay?when the climber falls or weights the rope?the cam in the device automatically cinches down to arrest the rope. COMFORTABLE and CONVENIENT: Simple to use for belaying both lead and top rope climbers. Rope installation diagram engraved on the inside and outside of the device serves as a friendly reminder to novices and experts alike. ERGONOMIC: Ergonomic handle allows belayer to easily unblock the rope and lower someone. Durable, compact, and lightweight (175 grams). ROPE COMPATIBILITY: Compatible with 8.5 to 11 mm dynamic single ropes. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!