Here's what other sites are saying:
The Petzl Basic Multipurpose Compact ascender works great for hauling systems, for ascending fixed lines and as self-protection when climbing a fixed rope.
The Petzl BASIC rope clamp is a compact ascender that offers excellent grip for rope ascents. The lower attachment hole is large enough to hold the carabiners for the lanyard and the footloop.
Petzl's Basic Ascenders are light, compact, and efficient. Their self-cleaning stainless steal toothed cams allow them to be used for climbing fixed lines or as a progress capture on hauling systems. The lower attachment is large enough to fit 2 carabiners.
- Mountain Gear
A multi-purpose, compact ascender, the Petzl BASIC is super lightweight and offers excellent grip for rope ascents.. . . Can be used for rope ascent on a fixed line or as progress capture in a hauling system. Toothed cam with self-cleaning slot optimizes performance under any conditions (like dirty or frozen ropes). Stainless steel cam offers better resistance to corrosion. Lower attachment hole is large enough for both the lanyard and foot loop carabiners. Upper connection hole helps guide the rope. Made for use with single ropes between 8 and 11 mm.