Red Glow In The Dark Shift Knob For Manual Throw Shifter 10X1.25 K61 for Mazda 3 These knobs are NOT painted. The color will NEVER rub off or lose its shine! NO SET SCREWS! All-metal threads so your shift knob WON'T wobble or fall off. Perfectly sized at 2 1/8" diameter, the 4oz design feels ROCK-solid in your hand. Made in the USA. Sickspeed is proud to be America based, and American owned! Features a Glow in the dark design, just charge them up in light and they will glow for hours.