The Proxxon Tungsten Carbide Replacement Tips (No. 24557) are a 10-piece set of disposable tungsten carbide turning inserts for the Proxxon Cutter Set with Tungsten Carbide Inserts (No. 24555), compatible with the PD 250/E and PD 400 lathes. When the cutting edges of the inserts in the No. 24555 cutter set are worn, these replacement tips restore full cutting performance without replacing the entire holder set. Disposable insert tooling offers a significant advantage over HSS tooling for lathe work — when an edge is worn, the insert is indexed or replaced rather than reground, maintaining consistent geometry and saving setup time. Tungsten carbide inserts outlast HSS in hard materials and maintain sharper edges at higher cutting speeds. Key Features 10-piece set — generous supply of replacement inserts for extended turning work Tungsten carbide — outlasts HSS in hard materials; maintains edge at higher speeds Disposable design — replace worn inserts without regrinding; consistent geometry every time For No. 24555 holders — direct replacement for the 3-piece cutter set Specifications Part Number: No. 24557 Quantity: 10 tips per set Material: Tungsten carbide For holder: No. 24555 (Cutter Set with TC Inserts) Compatible lathes: PD 250/E, PD 400 Works Well With Cutter Set with TC Inserts — 3-Piece (No. 24555) — the holder set these tips are designed for Precision Lathe PD 250/E (No. 34002) — primary compatible lathe Quick-Change Tool Post for PD 250/E (No. 24026) — tool post system for the PD 250/E Individual Quick-Change Tool Holder (No. 24024) — additional holder for the quick-change system Parting Tool Holder & Tool (No. 24217) — HSS parting tool for the PD 250/E quick-change system Spare Parting Tool Cutter (No. 24554) — replacement HSS blade for the parting tool holder Returns can only be accepted for unused product in its original packaging. A copy of the original packing slip or invoice is required. For warranty claims please call 1-877-776-9966. See our full return and refund policy. California Residents Prop 65 Information WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.