Complete 131-Piece Kit Includes 5 HSS drill bits, 5 HSS taps, 5 break pin tools, and thread inserts in common SAE sizes: 1/4""-20, 5/16""-18, 3/8""-16, 7/16""-14 (25 each), and 1/2""-13 (10 pieces). Durable Materials High-speed steel drill bits and taps provide strength and wear resistance. Thread inserts are made from 304 stainless steel for long-lasting performance and improved thread durability. Thread Repair Solution Designed to repair stripped or damaged internal threads and create stronger, more reliable threads across a range of materials. Wide Application Suitable for use on metals, composites, and plastics. Commonly used in automotive, mechanical, and plumbing applications. Precision Performance 135-degree drill bit tips improve cutting efficiency and penetration. Inserts allow for higher torque applications in softer materials. Organized Storage Case All components are stored in a blow-molded case for easy organization, transport, and accessibility.