Specifications:Material: BrassCollet Size: 2.4mm / 0.1"Clamping Range: 2.1-2.5mmCollet Shank Diameter: 4.8mm / 0.19" Descriptions:Made of brass material.Suitable for combined use with a hand drill or electric drill,to drill ABS,wood board,etc. Package Contents:5 x Drill Collets.
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