Gibraltar SC-BDTR/S

SC-4E
2-3/8 (60 mm) tension rods
Fits some floor toms and bass drums. (6PK, w/washers)
Tension Rods Reference Guide
Key Rod - Tension rod with drum key style head. Generally used on snare drums, tom toms, and at the bottom of a bass drum.
T-Rod - Tension rod with T-handle. Used on bass drums.
Diameters
7/32" - Fits tom and snares for Pearl, CB, Mapex, Tama, Ludwig, Gretsch, Premier, Pacific, and most other manufacturers with the exception of Sonor. Fits DW drums prior to 1996 production.
6 mm - Fits bass drums for Pearl, CB, Mapex, Tama, Ludwig, Gretsch, Yamaha, and other generic Taiwan-made drums. Other manufacturers generally use 7/32" dis b ss drum key rods.