29 Pcs ER40 Precision Spring Collet Set for Boring, Drilling, Tapping, Milling Lathe Engraving Tool - Ligavender, 738630082799

• UPC   738630082799
• ▷ ER40 spring collet set tools made from high quality steel is very durable, durable, lasting. ▷ Excellent stability: ER40 collets machine are slotted alternately from both ends, and therefore they have excellent grip on the cutter shank. ▷ Big clamping force and wide clamping range：1/8"、5/32"、3/16"、7/32"、1/4"、9/32"、5/16"、11/32"、3/8 "、13/32"、7/16"、15/32"、1/2"、17/32"、9/16"、19/32"、5/8"、21/32"、11/16 ", 23/32", 3/4", 25/32", 13/16", 27/32", 7/8", 29/32", 15/16", 31/32", 1". ▷ For Widely used in boring, milling, drilling, tapping, CN-C, sculpture and other processing operations, also can be supported used with the holder of C-NC tool. ▷ It might have some scratches during the transportation. Please understand that. ▷-308℉ Ultra-Long Cryogenic Treatment: Cryogenic treatment is the transformation of retained austenite into martensite. The precipitated nano-scale carbide particles are in terms of hardness and toughness. Reduce residual stress and enhance wear resistance