The Gibraltar Wing Nut Tension Black Tom / Floor Tom Bracket mounts to the shell of a drum or tom suspension mount.

It allows you to mount a floor tom leg or an L rod to your tom. It will fit rod diameters of 9.5mm to 12.7mm, and has a hole spacing of 2" center to center. A memory lock is included to help memorize tom position on the leg or L rod. The spec of the mounting screw on SC-STL3 is #12-24, the diameter is about 7/32".