Cliff kmk10e knurled aluminium shell push fit d shaft 6mm knobs cliff fc7259 these black anodised aluminium push fit knobs from cliff are ideal for use with equipment with 6mm d shafts these knobs consist of a machined aluminium shell mounted on a moulded plastic inner for versatility and ease of installation cliff fc7259 kmk10e knurled alu shell knob push d shaft 6mm black anodised