5/8in ISC Medium Cast Block Blue 16 Strand The unventilated outer shell protects

The unventilated outer shell protects against electrical hazards

you can use it to safely lower loads (like a set of bells) from an elevated location

The Am’D lightweight asymmetrical carabiner is made of aluminum

Unfortunately

Used to  adjust the length of your positioning lanyard

5/8in ISC Medium Cast Block Blue 16 Strand The unventilated outer shell protectsThe medium version is now manufactured using Hot Forged Technology, combined with high quality materials and components. These blocks are rope friendly, durable and extremely robust. These features combined give maximum security and strength, when the block is rigged as part of an impact system. Apart from the aesthetically pleasing curves, the ISC impact pulley is designed to work (together with textiles) to absorb the huge forces which are created