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Special step drill, indispensable for insulation of MÄRKLIN-wheels. Model railway wheels must be drilled for insulation in order to take in the insulating bush. Only one-step working with our special step drills. First step drills hole for axle plus bush, second step drills out for flush fitting of collar on rear of bush.
Step drill 3,2 / 6,0 mm Ø for MÄRKLIN Bogie/Pony wheels. Step drill 3,6 / 6,0 mm Ø for MÄRKLIN driving wheels.
