21Pcs Indexable Lathe Turning Tool Kit,3/8" 10mm Shank and Carbide Inserts

Key features

• Seven Holders, Four Machining Jobs — External turning, chamfering, grooving and parting, 60° threading on both the outside and the inside, plus boring are covered by seven indexable holders: SCLCR1010H06, SDJCR1010H07, SDNCN1010H07, SER1010H11, SNR0010K11, MGEHR1010-2, and S10K-SCLCR06.
• Sized for Small and Bench Lathes — A 10mm square shank is the practical middle ground between 8mm micro tooling and heavier 12mm bars. It suits 7x10 to 8x14 bench lathes and metric quick-change tool posts, and keeps cutting forces light for hobby-scale workpieces.
• External and Internal Threading in One Box — A matched 60° pair handles both sides of threading jobs: SER for external threads, SNR for internal threads. Internal threading bars are the piece most kits at this price leave out, so repair and one-off work stays in-house.
• 10mm Shank for Metric Tool Posts — The 10mm (0.394") square shank is built for 10mm tool posts and metric quick-change holders, including most QC posts with interchangeable shims. It is not a drop-in for a standard 3/8" (0.375") English opening, so verify your post size before ordering. Boring bars additionally need a workpiece bore large enough for bar plus insert.
• Fourteen CVD-Coated Inserts = Two per Holder — Worn edge becomes a quick index or swap instead of a reorder, and a matching wrench ships with every holder so the swap needs no extra tools. The CVD-applied titanium-nitride (TiN) coating adds a wear-resistant layer over the carbide body. Positive-rake geometry targets the metals a home shop actually cuts — 6061 aluminum, 360 brass, 12L14, and low-ca

Every Job a Small Lathe Faces Seven indexable holders and fourteen CVD-coated carbide inserts turn one box into a full tool rack: turning and chamfering with SCLCR/SDJCR/SDNCN, grooving and parting with MGEHR, external 60° threads with SER, internal threads with SNR, and boring with the S10K-SCLCR06 bar. Each holder uses standard ISO insert styles, so replacement inserts stay easy to source.Matched for Home-Workshop Metals The insert geometry favors the three metals most hobby machining touches: 6061 aluminum, 360 brass, and 12L14 free-cutting steel, with low-carbon steel handled comfortably at moderate speeds. Positive rake keeps the cut free and the finish smooth on light bench lathes. 304/316 stainless is possible only with conservative speeds, feeds, and depth of cut. The working window covers metals up to 40 HRC (Rockwell C) — aluminum, brass, free-cutting and low-carbon steels, plus many annealed or pre-hardened alloy steels on light passes. Hardened tool steel, titanium, and nickel-based alloys sit above 40 HRC and are outside this kit's design range.Honest Steel: AISI 1045 Bodies Each of the seven holder bodies is machined from AISI 1045 medium carbon steel (45#), quenche

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