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3.5mm drill bit

3.5mm drill bit - for drilling holes for turret-board to chassis mounting

I've found that 3.5mm is the correct size for making holes to mount turret boards to chassis. I use normally M3 hardware for this, but I found that a 3mm hole often makes perfect alignment tricky (maybe due to temperature changes and different expansion factors for aluminium and phenolic/PTFE). The extra 0.5mm really helps.
Price: £0.50
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