The 99pc Titanium Coated Drill Bit Set features drill bits ranging in diameter from 1/16" to 3/8", suitable for drilling into materials like aluminum, copper, soft alloy steel, wood, and plastic. Made of titanium and stainless steel, the set includes bits with 135° tips of various lengths, depths, and heights. Weighing 1lb 9oz in its case, this drill bit set is designed for various drilling applications and is a valuable addition to any workshop or tool collection.