If you held this knob up to a light source you would see first hand the level of detail we put into aging our parts. Fine knurled. A set of 4, these knobs are slightly ambered to look like they have been in thousands of bars (cigarette smoke, anyone?) While the look is sublte, it really compliments the overall effect the aging has on the knob. Please Note: All guitars manufactured in Japan, China, Indonesia and Mexico use metric pots (6mm), and have metric sized holes drilled for the pots. All pots sold by RS Guitarworks use standard pots and hole diameters (3/8"). Therefore, holes in the guitar, plates and/or pickguards will need to be enlarged to 3/8" to fit properly. Also, metric knobs will not fit the RS pot shafts; most popular knobs are available on the store in new and aged versions.