A Drill Chuck Adapter 1/2 Inch Sds Is A Useful Tool That Connects An Sds Or Sds-Plus Hammer Drill To A Standard 1/2 Inch Drill Chuck. It Allows You To Use Regular Straight-Shank Drill Bits With An Sds Drill.It Is Made From Hardened Steel For Durability And Is Mainly Used For Rotary Drilling (Not Hammer Mode). This Adapter Helps Make Your Sds Drill More Versatile For Wood, Metal, And Plastic Drilling Tasks.