Maxwell RC12/10 12V Capstan Windlass f/3/8" Chain & 3/4" Rope [RC1210CAP12V]RC12 10 12V Capstan Windlass The RC12 fully automatic windlass series is designed to effortlessly retrieve and deploy 10mm (3 8") short link chain and 16mm (5 8") to 20mm (3 4") three strand or 8 Plait rope (RC12 10) and 12mm 13mm (1 2") short link chain and 20mm (3 4") three strand or 8 Plait rope (RC12 12). With a maximum pull of 1590 kg (3500 lb), and an anchor retrieval rate of 15m min (50ft min), the RC12 12 is one of the fastest and gruntiest