Blocks

Home > Sailboat Hardware

Single Blocks

Single Blocks with Becket

Single Blocks with Cam

Single Blocks with Cam & Becket

Furling Lead Blocks

Double Blocks

Double Blocks with Becket

Standup Blocks

Upright & Lead Blocks

Snatch Blocks

Triple Blocks

Triple Blocks with Becket

Triple Blocks with Cam

Triple Blocks with Cam & Becket

Quad Blocks

Fiddle Blocks

Fiddle Blocks with Becket

Fiddle Blocks with Cam Cleat

Fiddle Blocks with Cam & Becket

In Line Linked & Traveler Blocks

Cheek & Foot Blocks

Wire Blocks

Exit Blocks

Lashing Blocks

Featured Brands

Defender offers one of the widest selections of marine sailboat blocks in a wide range of sizes and materials. Micro Blocks, Dinghy Blocks, Mid-range Blocks, Big Boat Blocks, Snack Blocks and Specialty Blocks from Lewmar, Harken, Schaefer, Ronstan, Selden, and Antal are in stock at the lowest prices. If you do not see the blocks you need we can get probably them call 800-628-8225 or contact us.

Boat Blocks

Marine environments create unique situations when working line under load. Boat blocks or marine block and tackle systems allow boaters to control heavily weighted line, and in the case of high winds and sails under load, these purchase systems make controlling loads possible.

It's all about control

Working heavy loads, especially lines connected to sails, could be impossible without the help of a marine block and tackle system. These systems of pullies, allow for seamless furling and adjustment of all the sails aboard. Smooth control of the sails through the use of sailing blocks can mean the difference between winning a race and being just another racer!

Power when you need it

The proper boat block and tackle system make lifting a heavy load easy. The more blocks in the system the more lift is exerted on moving the object or line. A block and tackle system will give you the power you need... every time!

A block for every job

Installation of boat blocks varies from clamp-on to fixed base. Marine blocks are fabricated of high-strength plastic, aluminum, and stainless. Optional cams and beckets on single blocks right up to heavy-duty quad blocks mean there is a block and tackle for every application and every boater.