Black Diamond ATC Pilot Belay / Rapel Device The ATC Pilot threads similarly to other tubular belay devices and accommodates ropes from 8.7-10.5mm. The durable steel braking surface has no moving parts, and the smooth and secure control allows for gradual lowering. With an easy rope payout, the ATC Pilot makes single-pitch projecting burns less tiring for the belayer and more secure for the climber.SpecificationsWeight:  92 g