I-Roclell & Superfail RocKwell Hardness Block
Brinoll hardness block
Elinye ibhlokhi le-hardness
Ama-Vickers kanye nama-hickers aviker hardness block
Umgcingasi wemali
I-Eyepiece nenhloso
Indlu ye-Leeb Impact
Ukudla kweMetallographic
