21Pcs Indexable Lathe Turning Tool Kit,3/8" 10mm Shank and Carbide Inserts | 7Pcs 10mm Metal Lathe Tool Holders,14 Pcs Set Carbide Turning Insert for Metal Cutting,Grooving,Threading,Boring

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