# Harken 1 Ton Twing Block [3405]

**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

  
[Owner's Manual (pdf)](https://productimageserver.com/literature/ownersManual/103567OM.pdf)

## Details

- **Price:** 251.95 USD
- **Type:** Fishing Accessories
- **Tags:** 1st Class Eligible, Brand_Harken, Hunting & Fishing, Hunting & Fishing | Fishing Accessories, MAP

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 251.95 USD | In stock |

## Images

- Harken 1 Ton Twing Block [3405] Harken

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> Source: [Besafe1st](https://besafe1st.com/products/harken-1-ton-twing-block-3405)
> Updated: 2026-06-04