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This flexible shaft can extend the function of electric grinder & drill to engrave， polish， milling. It can turn unwieldy electric grinding into deft manual grinding. Features:High quality: stainless steel nut， solid plastic grinder handle & protective spring.Turn unwieldy electric grinding into deft manual grinding with this shaft.Widely used in drilling， engraving， milling， grinding works.Perfect to use with Dremel or 180W electric grinder.Note: Please straighten the shaft on using to extend the service time of this accessory.Specifications:Color: BlackShaft Length: 108cm Connecting Slotted Nut: 4 * 2cm / 1.58 * 0.79in (Length * Outside Diameter)Slotted Nut Model: M18-M19Transmission Shaft: 99 * 3cm / 38.98 * 1.18in(L * W)Item Weight: 205g / 7.23ozPackage Weight: 208g / 7.34ozPackage List:1 * Electric Grinder Shaft