1. Includes: Annular cutter extension rod x 1; L key x 1.
2. Material: Crafted from high-strength 40Cr alloy steel for enhanced toughness and hardness; long service life, suitable for professional use.
3. Suitable for all annular cutters with 19mm Weldon shank.
4. High-precision Weldon shank extension for use on magnetic drill presses.
5. Warning: Annular cutter diameter must be larger than 35mm (1-3/8"). Otherwise the bottom of the extension rod will jam, causing malfunction.