The PIU is Retired You've found a page of history! The PIU is no longer available to buy from any major online retailers but you can still check out all the specs and claim your ownership.

Cassin PIU Belay Device

CAMP Cassin PIU Top View
CAMP Cassin PIU Top View

• Rock Climbing, Alpinism, General Mountaineering
• Rope friendly design
• Auto-locking when belaying one or two climbers on top rope
• Diagonal cable prevents the rope from rubbing and jamming

The rope-friendly Piu is engineered to provide solid lock-offs when belaying and smooth rappels. Its wide, rounded rope-bearing surfaces are less prone to jamming than devices with V-slots and more gentle on ropes than thin-walled devices. The thick walls also help prevent over-heating and ensure greater durability. The keeper cable is angled to prevent interference with ropes while rappelling and the extra carabiner hole allows the Piu to be easily rigged as an auto-blocking device when belaying one or two followers.

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Technical Specifications

Weight 70 g
Type of belay device Tube
Teeth No
Guide Mode Brake Assist Up to 2 followers
Belay Brake Assist No
Rope Range 8.0 mm - 11.0 mm


There's a newer, lighter model the PIU 2, is a bit more expensive but it's lighter!