The As16 Hand Ascender Is Designed For Rope Ascent. It Is Designed To Be Used With Two Hands By Placing One On Top Of The Blocker And The Other On Large Handle. The Wide Lower Hole Can Connect Several Carabiners Whereas The Upper Hole Is Designed To Clip A Single Carabiner To Secure The Rope. The Full Stainless Steel Mechanism Insures A High Durability.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }