QLOUNI 5pc 9" Extra Long Drill Bit Imperial 1/4", 5/16", 3/8", 7/16", 1/2" Hex Shank Brad Point Augers Drill Bits

QLOUNI Metric Brad Point Set -- Precision Size: 1/4", 5/16", 3/8", 7/16", 1/2"; Total length: 9" Long Length Drill Bits, The Auger Wood Drill Bit with Hexagon Shank, make grips stronger! QLOUNI Titanium Coated Drill Bit Set with Sharp Drill -- Easy to Use A fine set of drills, well tooled and sharp even in very hard wood, plastic and aluminum alloy material, can be used in a Hand Auger or power drill. Specifications: Length: 230mm/9.05" Size : 1/4", 5/16", 3/8", 7/16", 1/2" Material: High-carbon steel Category: Deep hole drilling Kindly Note: 1. When you use this drill bits, the material (eg. aluminum alloy, wood, plastic, etc) temperature will get very high, please add some water or coolant to avoid the material get smoke when using it. 2. The speed should not be too fast, otherwise easy to smoke, charred, etc. 3. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. Package Includes: 5 x Extra Long Drill Bit