All L-Rods are designed to be used with the MC66 or MC5 Clamps. The LLT is an L-Rod for attaching a tom tom with a pipe diameter of 10.5mm. The LCB is an L-Rod for attaching a cowbell or mountable tambourine. It has a diameter of 9mm. The LCY is an L-Rod especially designed for mounting a splash cymbal or bell type cymbal.