Send us a message. Jewelry Tool Quick Change Graver Hand Piece Connector Engraving Pneumatic Shank. Measuring at a convenient length of 25.5mm, this connector is compact and comfortable to hold during intricate engraving tasks. The chuck hole size of 3mm ensures compatibility with a wide range of graver blades, allowing you to switch between different tools effortlessly. Featuring a button diameter of either 6mm or 6.3mm, this quick-change connector provides a secure and reliable grip, preventing slippage and ensuring optimal stability while engraving. This makes it an ideal tool for jewelry makers, craftsmen, and engraving enthusiasts seeking efficiency and accuracy. We will answer You quickly.