Annagaboolal is-taabasho ah Xulashada waxaa loo sameeyay si sax ah si loo daboolo heerarka ugu sarreeya ee isku xidhka ee mashaariicda wax soo saarka warshadaha, ganacsiga, iyo kuwa gaarka loo leeyahay. Loogu talagalay inay abuuraan duntooda isku xidhka inta lagu jiro rakibidda, boolalku waxay bixiyaan xiriir adag oo u adkaysta gariirka iyada oo aan loo baahnayn godad hore loo qoday.
Waxaan bixinaa noocyo badan oo habayn ah, oo ay ku jiraanHex Head Slotted Self - Tapping Bowler, Pan Head Phillips Zinc - Plated Self - Tapping Bowler, Countersunk Head Torx Self - Tapping Bowler, iyo Countersunk Head Phillips Bir aan miridh lahayn Iskeed - Tapping Bowler, dhammaantood waxaa lagu sameeyay bir aan miridh lahayn oo heer sare ah, naxaas, iyo bir daxalaysan si loo hubiyo xoog sare oo la jiidi karo iyo iska caabin daxalka.