Tungsten alloy pillar fragment is composed of many tungsten alloy pillars, and these pillars are the ideal choice to make the largest damage in a given filling volume. That is because tungsten alloy as a raw material has high density and compressibility. The typical quality test for tungsten alloy pillar fragments is a crushing test, in which tungsten pillars are compressed to less than 50% of its original volume, or even 70%, but they do not break or disintegrate into powder.
More details, please visit:
http://www.tungsten-alloy.com/en/alloy04.htm
Tungsten alloy pillar fragments have the advantages of high density, high storage speed, and strong armor-piercing ability. The grenade with such pillar fragments can play a more intensive killing effect within the set range. Tungsten alloy pillar fragments are pre-processed. The tungsten pillars of pre-designed shape and quality are made into prefabricated fragment casings, and are installed on the inner surface of the grenade shell.