Gibraltar SC-BDTR/L Bass Drum T-Rod 6Mm 4Pack SC-BDTR/L Bass Drum T-Rod Gibraltar SC-DBTR/L bass drum T-rods fit most bass drums with 6mm lug swivel nuts, with the exception of drums which have extended space between the hoop and lug receptacle (We recommend that you measure this space before purchasing) Gibraltar SC-DBTR/L bass drum T-rods fit most bass drums with 6mm lug swivel nuts, with the exception of drums which have extended space between the hoop and lug receptacle (We recommend that you measure this space before purchasing)