ISC Professional Left Hand Ascender - 2 Hole 10 - 13 mmThe RP240 Ultrasafe Hand Ascender from ISC is a professional ascender suitable for tree care operations. It is heavier because the ultrathin frame on most ascenders has been replaced by a thicker and more solid frame. This makes movement around limbs and branches safer than standard ascenders as there are no sharp angles to create issues when the ascent line is not running perfectly vertically through the ascender. 360 View ISC Professional Hand