Whiteside 9750 CNC Carving Machine Extension Adapter 1/2 in. Shank with 1/4 in. Collet is designed to extend the reach of your CNC carving projects, providing greater depth for intricate routing and veining tasks. This adapter functions as an arbor extension, featuring a 1/2" shank that fits securely into your machine, while its collet is specifically designed to accept 1/4" shank bits. With an overall length of approximately 3-5/8", it the balance of reach and control for light routing applications, making it an essential accessory for enhancing your carving capabilities. Model Number: 9750