Chuck Quick Change Drill Screwdriver Adapter

Description: Material: Aluminum alloy and carbon steel Accepts accessory rotary bits with 0.012 inch(0.3mm) to 0.12 inch(3.2mm) shanks Easy and change accessories replacement on without changing collets General usage: This drill chuck is widely used along with various drill machines milling machines lathes boring lathes and electric hand tools Excellent upgrade compatible with thousands of model Specification: Height :23mm Clamping Range: 0.3-3.2mm Size :.5mm 7mm refers to the grinding machine shaft outer diameteris 7mm 0.75 is screw thread pitch is 0.75mm your grinding machineshaft outer diameter measurements is 8mm you can consider it. Package Includes: 1 Piece Drill Chuck