Galvanized Bow Shackle.

The most popular of all anchors. With a heavy duty hot galvanised finish they are suitable for mud or sand. The anchor size refers to the approximate weight in pounds (lb). Make sure you choose the right size for your boat.
4lb - Boats up to 3 mtrs
6lb - Boats up to 4 mtrs
8lb - Boats up to 5 mtrs
10lb - Boats up to 6 mtrs
13lb - Boats up to 7 mtrs

This is what we use for the safety gear packs for all of our boats. Available in 3 sizes they come with 50mtrs of rope in the correct size, 2 gal shackles, stainless eye in the end of the rope and the correct amount of chain.
6lb kit - 50m by 6mm rope and 2m by 6mm chain.
8lb kit - 50m by 8mm rope and 2m by 8mm chain.
10lb kit - 50m by 10mm rope and 4m by 8mm chain.

All four anchor kits are 4 prong and are supplied straight and you bend them yourself with a bit or pipe or in a vice. It's not hard to do. Available in 4 sizes they all come with 50mtrs of silver rope all in 8mm thickness, 2 gal shackles, stainless eye in the end of the rope and the correct amount of chain. The 4 kits are:
8mm pronged anchor with 2mtrs chain - suits 3m - 4m boat
8mm pronged anchor with 3mtrs chain - suits 3.5m - 4.5m boat
10mm pronged anchor with 2mtrs chain - suits 4.5m - 5m boat
10mm pronged anchor with 3mtrs chain - suits 5m - 5.5m boat