The Harken 57mm Carbo Fiddle Rat.w/Becket is an advanced Fiddle Block With Becket, designed for sailors to manage loaded lines with a perfect balance of holding power and controlled easing.
| Sheave Ø (mm) | 57 mm |
| Sheave Ø (in) | 2 1/4 in |
| Length (mm) | 143 mm |
| Length (in) | 5 5/8 in |
| Weight (g) | 121 g |
| Weight (oz) | 4.3 oz |
| Shackle pin Ø (mm) | 5 mm |
| Shackle pin Ø (in) | 3/16 in |
| Maximum line Ø (mm) | 10 mm |
| Maximum line Ø (in) | 3/8 in |
| Maximum working load (kg) | 359 kg |
| Maximum working load (lb) | 792 lb |
| Breaking load (kg) | 1080 kg |
| Breaking load (lb) | 2380 lb |
| Holding power | 10:1 |