JOHNSON HOOK TYPE SNATCH BLOCKS Why SNATCH blocks? The snatch block is one of todays most widely used types of blocks. As generally applied, its title refers to that group of intermittent-service blocks which quickly attache and snatch or move loads over relatively short distances. This is opposed to long lifts and continuous service for which crane and construction blocks are designed. Gunnebo Johnson produces a wide variety of multipurpose snatch blocks. Over 235 models of single and double sheave snatch blocks are offered. Capacities range from 2 to 30 metric tons; sheave diameters, from 3 through 24 inches. Custom designs and sizes available also.