Anchor size recommendations are for boats of average windage and proportions in 30 knots of wind, average bottom conditions, and moderate protection from open seas. Remember that the loads in 42 knots of wind are twice as much as in 30 knots.
Use three-strand nylon rope, 6-12 ft (2-4 m) of chain and a minimum of 5:1 scope. Also, a minimum of 6 ft (2 m) of chain should be used for every 25 ft (8 m) of water depth. For storm conditions use an anchor one or two sizes larger.
Shank: 22 in (56 cm)
Fluke: 13 in (33 cm)
Stock: 18 in (46 cm)
Proof Coil Chain: 3/16 in (5 mm)
Nylon Rope: 3/8 in (10 mm)
Shackle Size: 3/16 in (5 mm)
Boat Length: 17-22 ft / 5-7 m Weight: 4 lbs / 2 kg
HOLDING POWER 32 degree (Hard Sand): 1,725 lbs / 782 kg 32 degree (Soft Mud): 345 lbs / 156 kg
Recommended for the Guardian G-7: 4LB Anchor for Boats 17-22' - Fortress Anchors