35 Self-Tailing Radial Aluminum Winch - 2 SpeedThe Radial winch drum&&';;s gripping surface is shaped for each winch size and drum material and features diagonal ribs (rather than textured abrasive materials) to maximize gripping power and greatly reduce line wear. The self-tailing mechanism on the winch means that one crew member can quickly and easily trim or raise sails.Specifications: Material: Aluminum Configuration: Self-tailing Speed: 2 Drum: 80mm/ 3-1/8in Base: 149 mm/ 5-7/8in Height: 170mm/ 6-11/16in Weight: 3.6kg/ 7.9lb Line entry height: 79mm/ 3-1/8in Minimum line: 8mm/ 5/16in Maximum line: 12mm/1/2in Fastener circle: 123mm/ 4-7/8in Fasteners: 6 SH mm/ 1/4 SH in Number of fasteners: 5 Gear ratio-1: 2.13 Gear ratio-2: 5.65 Power ratio-1: 13.50 Power ration-2: 35.90 Available power: Manual