Simple and efficient, the innovative K-Block is outstanding for numerous applications. Attached by a basic lashing and combined with a simple design, they are very light yet achieve very high working loads. Between the light weight of the block and the lashing, you can save about 50% weight over conventional blocks.

Lashing through the block's center increases safety in the event of block failure, since the line remains captive in the lashing. Lashing also allows for a huge range of applications and mounting positions, and reduces noise compared to mechanical attachments such as shackles and pins. Lashing instructions from Karver can be found here

The standard Karver blocks are assembled with rollers and ball bearings to ensure very low friction. The KB6 and KB8 have yellow composite cheeks istead, while the KB10 and up have aluminum cheeks. Ideal for sheets and halyards, where a line under high load must turn on a long radius.

The High-Load versions (part numbers end in "C") all have aluminum sideplates and feature self-lubricating, Teflon impregnated bearings to ensure a high working load and breaking strength in relation to their size. Ideal for applications like runners, barber haulers and cunningham, where a highly loaded line must turn on a tight radius.

The KBO block is born to simplify lashing use. Every sailor can enjoy lashing advantages with as less manipulation as standard metallic attachment blocks: it is even easier and faster to install a KBO than a regular block with stainless steel shackle. Designed to be extremely lightweight.

KBO includes side ball and center roller bearings. Friction ratio is minimum. The maximum rope diameter has been increased in this model. The KBO1 Block includes a Rope shackle guide.