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Use as sheet control blocks on dinghies, or for control lines on larger boats. High-impact Delrin® sheaves turn on polished stainless steel spacers, so the cheeks won't squeeze or bind the sheave, even under extremely heavy loads. Head shackles are stamped stainless steel with clevis pin and cotter ring. Cheeks are black hard-coated anodized aluminum. Straps, headclips, shackles, and rivets are tumbled and polished stainless steel.
- Sheave: Delrin
- Sheave Size: 1-7/16"
- Line Diameter: 7/16"
- Cheek Material/Finish: Aluminum
- Safe Working Load: 1,000lb.
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Pros
- Attractive Design
- Consistently reliable
- Easy To Install
- Easy To Use
- Quality Construction
Cons
Best Uses
- Large Boats
- Sailing
- Small Boats
Comments about Schaefer Series 303 Aluminum Blocks:
I have Schaefer blocks all over my boat. Some are more than 10 years old. Maintenance has just been hosing them off or letting the rain do it. None have ever failed or exhibited excess friction. The price is right and the look fine.
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Product Specs
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