Wararka

1. Dhexroor: Dhexroorka caadiga ah waxaa ka mid ah M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, iwm, oo millimitir ah.

2. Dhererka dunta: ulaha dunta leh ee dhexroorkoodu kala duwan yahay ayaa caadi ahaan u dhigma garoomo kala duwan. Tusaale ahaan, garoonka M3 inta badan waa 0.5 millimitir, M4 inta badan waa 0.7 millimitir, M5 inta badan waa 0.8 millimitir, M6 inta badan waa 1 millimitir, M8 inta badan waa 1.25 millimitir, M10 sida caadiga ah 1.5 milimitir, M12 sida caadiga ah 1.75 millimeter, iyo M16. inta badan waa 2 millimitir.

3. Dhererka: Waxaa jira tilmaamo badan oo dherer ah, kuwa caadiga ah waxaa ka mid ah 10mm, 20mm, 30mm, 50mm, 80mm, 100mm, 150mm, 200mm, iwm. Dhererka gaarka ah ayaa sidoo kale loo habeyn karaa iyadoo loo eegayo baahiyaha

4. Heerka saxda ah: Guud ahaan waxaa loo qaybiyaa heerka A, heerka B, iwm., heerarka saxnaanta kala duwan ayaa laga yaabaa inay ku kala duwanaadaan saxnaanta cabbirka iyo qallafsanaanta dusha dunta.

Waa in la ogaadaa in shuruudaha qeexitaanka gaarka ah ay kala duwanaan karaan iyadoo ku xiran xaaladaha kala duwan ee codsiyada iyo heerarka warshadaha.