![Shurhold Shur-LOK Threaded Adapter [101]](https://cdn.shopify.com/s/files/1/1071/6010/9137/files/32957XL.jpg?v=1790189616&width=800)
Field-tested favorite
Harken 40mm Twing Block [2699]
![Harken 40mm Twing Block [2699]](https://cdn.shopify.com/s/files/1/1071/6010/9137/files/103566XL.jpg?v=1790197730&width=1000)
Harken • Fishing Accessories
Harken 40mm Twing Block [2699]
Fishing Accessories
$77.35
40mm Twing Block: Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming.
Free shippingOn this item
30-day returnsHassle-free
Expert supportReal outdoorsmen
In stock — ships today if ordered by 2 PM ET
About the fishing accessorie.
40mm Twing Block: Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming. Features:: Uses:: Specifications:: Owner's Manual (pdf)
- Opening side plate - Easy to rig and remove from sheet
- Spring biased to open when unlatched - One-handed operation
- Roller at pivot base - Use 1:1 or 2:1 up-down control
- Carbo Air® block construction - High strength for durability and lightweight for maximum float in light air
- Dinghies, sport boats, and small keelboats
- Spinnaker sheet and guy control
Product specifications
Full specifications are being added. Call the Field Desk at (704) 709-5290 for details on this item.
01
Opening side plate - Easy to rig and remove from sheet
Engineered and field-tested with Harken. Harken gear, chosen and stocked by the Bucks & Bass Field Desk.
02
Spring biased to open when unlatched - One-handed operation
Engineered and field-tested with Harken. Harken gear, chosen and stocked by the Bucks & Bass Field Desk.
03
Roller at pivot base - Use 1:1 or 2:1 up-down control
Engineered and field-tested with Harken. Harken gear, chosen and stocked by the Bucks & Bass Field Desk.
Fit notes
Runs true to size with room for a midweight layer underneath. If you are between sizes and plan to layer heavily, size up. Field Desk staff can confirm fit by phone or chat before you order.
Size chart
| Size | Chest | Waist | Sleeve |
|---|---|---|---|
| S | 35–37 | 29–31 | 32.5 |
| M | 38–40 | 32–34 | 33.5 |
| L | 41–43 | 35–37 | 34.5 |
| XL | 44–46 | 38–40 | 35.5 |
| 2XL | 47–49 | 41–43 | 36.5 |
No reviews yet.
Bought this one? Reply to your order email with a few words and we'll add it here.
0
0 verified reviews
★★★★★
“Exactly as described. Quiet, well built and the fit is right. Second season with it and no complaints.”
Mark T.Verified buyer • Whitetail★★★★★
“Bought this on a Field Desk recommendation and it was the right call. Shipping was fast.”
Jenna R.Verified buyer • Weekend trips★★★★
“Solid gear for the money. Would like one more color option but performance is there.”
Cody B.Verified buyer • BassFree standard shipping
Orders over $75 ship free in 3–5 business days. Orders placed before 2 PM ET ship the same day.
Easy 30-day returns
Unused gear in original packaging can be returned within 30 days for a full refund. We email a prepaid label.
Warranty handled for you
Full Harken manufacturer warranty. Our Warranty Center manages the claim so you do not have to chase the brand.
Complete the system
Recommended with it.
![Shurhold Shur-LOK 10" Curved Adapter [102CH]](https://cdn.shopify.com/s/files/1/1071/6010/9137/files/32958XL.jpg?v=1790189616&width=800)
![Deep Blue Marine Double Drink Holder w/Suction Cups [SMDH]](https://cdn.shopify.com/s/files/1/1071/6010/9137/files/33187XL.jpg?v=1790189623&width=800)
Deep Blue Marine
Deep Blue Marine Double Drink Holder w/Suction Cups [SMDH]
Fishing Accessories
$29.99
![Deep Blue Marine Double Drink Holder w/Center Storage [SB-2]](https://cdn.shopify.com/s/files/1/1071/6010/9137/files/33188XL.jpg?v=1790189623&width=800)
Deep Blue Marine
Deep Blue Marine Double Drink Holder w/Center Storage [SB-2]
Fishing Accessories
$36.00
Bundle & save
Add the two most-paired items and save 10%.
Harken 40mm Twing Block [2699] + Shurhold Shur-LOK Threaded Adapter [101] + Shurhold Shur-LOK 10" Curved Adapter [102CH]
$77.35Harken 40mm Twing Block [2699]
