Katzco 3-Piece Power Extension Bit Set - For Drills, Socket Adapter Set &ndash; Hex Shank Fits All Drills- 3 Sizes, 1/4" 3/8&rdquo; 1/2&rdquo; - - By PACKAGE CONTAINS: 3 piece 1 of each Size: 1/4" 3/8 1/2 Turns any power drill into a power nut driver Sturdy spring-loaded ball bearing holds sockets securely in place Sockets Snap-On Tightly and Won't Slip Off HIGH QUALITY: Constructed of rust-resistant chrome vanadium steel for long lifetime handles the toughest jobs Hex shaft saves time changing out of Power Drill Saves time over traditional hand operated nut drivers EASY AND SIMPLE USE: kit Hardened & treated Chrome-Vanadium steel alloy for superior strength & durability Prevents Stripping during High Speed Drill Operation GREAT TO USE: At home, in the workshop or warehouse for hobby, hardware, auto repair, and so much more. Handles the toughest jobs, Hex shaft saves time changing out of Power Drill, Saves time over traditional hand operated nut drivers SATISFACTION GUARANTEED: Katzco will make sure that you will be satisfied with this set you buy from us. You are protected with our 100% No Questions Asked Guarantee for either a replacement or refund. We care about only putting out high quality products that satisfy your needs. If there is anything you need that we dont offer, we go and find the best for you.