Cliff kmk10e knurled anodised aluminium shell knobs for splined shafts cliff fc7256 a silver anodised aluminium knob for professional equipment with 6mm splined shafts the knob consists of a machined aluminium shell mounted on a moulded plastic inner for versatility and ease of installation cliff fc7256 kmk10e knurled alu shell knob spline shaft 6mm silver anodised