Here's what other sites are saying:
Stronger and longer-lasting than aluminum, Copper Heads from Yates Gear provide a durable addition to your rack for big wall and aid climbing.
- Mountain Gear
Aid piece for "big wall" climbing. Malleable copper head conforms to irregularities of rock.
Yates Aluminum Head
Yates Duck Head
$9 - $109
Moses Enterprises Logan Hook
Black Diamond Stopper Set No. 4-13
$76 - $99
$6 - $88
Metolius Ultralight Curve Nut
$4 - $189
Black Diamond Stopper Set Classic No. 5-11
$56 - $69