LDEXIN Precision R8 4mm Straight Shank Collet Chuck CNC Mill Chuck Holder Extension Rod Lathe Tool by LDEXIN at Defy Now. Hurry! Limited time offer. Offer valid only while supplies last. Material:65MN Steel Hardness :HRC55°-60° ; Precision: less than 0.013MM Drawbar Thread internally : 7/16''-20 The clamping hole diameter: 4mm Package Included:1pcs Metric Round Collet1pcs R8 4mm Straight Collet Chuck in a Pack, made of Carbon Steel,after a special heat treatment, sharp edges, high strength. CNC milling lathe collet chuck, carbon steel material, straight shank, clamping nut, toughened and precision ground.. Extension rod diameter and the other parts are precision ground to
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