Click to enlargeHarken 1 Ton Twing Block
Manufacturer: HarkenPart #: 3405SKU: 103567
- 2205 lb
- Aluminum
Item #: 103567
Category: Fishing Accessories
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Description
1 Ton Twing Block The Twing block features a spring-loaded side opening mechanism for true one-handed rigging, even while wearing sailing gloves. Black anodized aluminum sideplates are edged with robust bumpers to protect the block, topsides, and deck.
The sheave is aluminum rolling on a bearing system shared with Harken's existing 2. 3T high-load snatch block.
Features: Side opening side plate - Easy to rig and remove from sheet Spring loaded button release - Quick one-handed rigging Anti-capsize bar - Keeps sheave aligned on sheet ULC main bearing - Sheave turns smoothly under extreme loading Sideload balls - Carry loads especially when the block is not aligned in light air Thimble at pivot base - Use 1:1 or 2:1 up-down control Machined aluminum inner sideplates - High strength, low weight Soft polyurethane outer side plate bumpers - Protects block and deck Uses: Twing, tweaker control for code zero sheets Can be used as a snatch block when combined with a soft shackle Spinnaker sheet and guy control Specifications: Sheave Ø (mm): 38. 5 mm Sheave Ø (in): 1-1/2 in Maximum line Ø (mm): 11 mm Maximum line Ø (in): .
43 in Maximum working load (kg): 1000 kg Maximum working load (lb): 2205 lb Breaking load (kg): 2000 kg Breaking load (lb): 4409 lb
Specifications
| Brand | Harken |
|---|---|
| Part Number | 3405 |
| EverTide SKU | 103567 |
| UPC | 097653296706 |
| Material | Aluminum |
Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.
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Returns & warranty
Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.
Harken productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.
Sailing — frequently asked
- How do I size a block for my sailboat?
- Match the block to the line diameter it will carry and to the working and breaking loads of the system (sheet, halyard, control line). Makers publish load ratings and line-size ranges — choose a block whose working load comfortably exceeds the real-world load, without going so large it adds needless weight.
- What is running rigging?
- Running rigging is the moving lines that control the sails — sheets, halyards, and control lines — as opposed to standing rigging (the fixed wire that holds up the mast). Running rigging should be matched to the boat’s blocks, clutches, and winches for smooth, reliable sail handling.
- How do I maintain sailboat winches and hardware?
- Rinse with fresh water after sailing, keep sheaves and bearings clean, and periodically service winches (disassemble, clean, and re-grease per the maker’s instructions). Marine-grade stainless and good maintenance keep hardware working smoothly when loads are high and timing matters.
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