This 10-piece set combines high-quality left-hand spiral drill bits and precision screw extractors, specially designed for the efficient removal of broken or damaged studs, bolts, and fasteners. Constructed from premium M35 high-speed steel with 5% cobalt content, these tools deliver outstanding durability and performance especially when working with hard materials like stainless steel, high-tensile steel, and alloyed metals. The left-hand drill bits are fully ground, engineered to DIN338 standards, and feature a 135° split point for accurate, self-centering starts. The accompanying screw extractors are matched in size and equally robust, making this kit an essential solution for workshops and engineers dealing with seized or snapped fasteners. The set comes housed in a durable metal storage case for easy transport and organization.    Left hand spiral drill bits: Sizes: 5/64", 7/64", 5/32", 1/4" and 19/64" Engineering quality Longer life Superior performance with stainless steel HSS M35, 5% Cobalt HRC: 65-67 Fully ground 135 Degree split point DIN338 Standard Amber finish Screw extractors: Sizes: #1, #2, #3, #4 and #5 Engineering quality Longer life HSS M35, 5% Cobalt HRC: 52-58 Mill white finish.