Gibraltar SC-LRHS-1 Hex L-Rod Mount another toy or drum This L-Rod lets you mount a drum or percussion accessory Each end is 3-1/2" long, it's 12mm in diameter with a hexagonal mounting area on one end This L-Rod lets you mount a drum or percussion accessory Each end is 3-1/2" long, it's 12mm in diameter with a hexagonal mounting area on one end