Snatch blocks are among the most versatile and practical racing and cruising gear available. Unlike conventional blocks where the end of the line must be threaded through the block, snatch blocks can be opened and a line inserted at any point along a line already in use. Snatch it to a track slide to make a genoa lead block. Attach a trunnion snatch block (see right) to the toe rail with a short line to "open up the slot" with a barberhaul to adjust jib leads outward and forward in heavy air, or to reduce twist when reaching. When changing headsails up or down, snatch blocks can carry the load temporarily while a new sheet is being rigged. Use it with a line tied to the boom as a preventer when sailing off the wind, or use a snatch block as a fairlead to lead an anchor line to a cockpit winch when kedging off after you've run aground. Snatch blocks can also be used as spinnaker lead blocks, foreguy blocks, boom end leads—even as part of the tackle to hoist an overboard crew member back aboard. They can be used anywhere there is an attachment point, except as genoa turning blocks. While snatch blocks are very strong, they are not intended to carry the heavy loads from a genoa.

Some jobs call for trunnion snatch blocks. These blocks swivel on two planes simultaneously to assure a fair lead. They're useful on spinnaker foreguys, vangs, preventers, sheets, and cunninghams, and are recommended where attachment to a toe rail is mandatory, or where the block cannot be suspended by its attachment becket to make it stand up when not loaded. Make sure that you allow for full articulation of deck or toerail-mounted snatch blocks. Usually it is best to attach a standard shackle to the toerail, and then attach the snatch block to this shackle, rather than attaching the snatch block directly to the toe rail.

For safety, position the opening of the snatch block away from the load. Fit the pullpin ring with a lanyard, and point the head of the pullpin outboard to prevent a lanyard snag which could trigger an inadvertent release of the block. Use the becket to tether the block to a lifeline when not in use. We recommend carrying a spare pair of snatch blocks aboard for any number of unexpected uses. Choose snatch blocks large enough to hold the largest size line you generally use. Make sure block cage and snap shackle are fully latched prior to loading. Failure to do so is dangerous and may damage the block.