Optional Types: M3-8, M3-8 Lengthened, M5-12, M5-12 Lengthened (As Pictures Show). M5-12:110 25mm. M5-12 Lengthened:290mm. M3-8:85 20mm. M3-8 Lengthened:240mm. A twisted ring around the tip of these keys allow you to loosen and tighten the tap on the key when you have oily fingers.
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