In modern performance sailing, traditional heavy steel shackles are rapidly being replaced by ultra-strong fiber lashings. The Harken 40mm T2™ Soft-Attach Double Block (Model 2150) stands at the forefront of this weight-saving design revolution. By utilizing a fiber-reinforced nylon-resin sideplate architecture that completely eliminates heavy metallic fasteners, rivets, and pins, Harken has produced a heavy-duty multi-part purchase block that weighs a feather-light 1.7 ounces.

Don't let the lack of metal fool you—this block is engineered for intense racing loads. True structural security comes from its through-head safety layout. The lashing line routes directly through the head of the block and straight out the center of the sheaves. This unique setup channels the dominant mechanical force along the line itself rather than stressing the composite sideplates, serving as a failsafe structural backup.

To combat a common pain point with soft-attach double blocks—twisting and capsizing under sudden load—the T2 Double features integrated composite line guides molded straight into the head.These guides physically push your Spectra® tie-line to the extreme outer edges of the sideplates, keeping the block perfectly stable, upright, and aligned with your load at all times.

Key Features

• Zero-Metal Architecture: Eliminates heavy stainless shackles and rivets, creating an ultra-lightweight profile that won't clatter against your deck or damage finish coatings.

• Anti-Capsize Line Guides: Molded composite head guides push the lashing lines outward, forcing the block to remain stable and upright under load.

• Through-Head Structural Safety: Routing the attachment line directly through the center of the sheave minimizes sideplate fatigue and provides a redundant physical safety backup.

• Delrin® Ball Bearings: High-clarity composite sheaves spin freely on curved races loaded with premium Delrin® ball bearings for lightning-fast trim response.

• Universal Rigging Versatility: Can be tied, lashed, or spliced to almost anything—ideal for cascades, bridles, travelers, and control blocks.

• Spectra® Line Included: Ships complete with a pre-cut length of genuine, high-tensile Spectra® lashing line to facilitate immediate installation.

Specifications