Specifications: Product Name:hole opener quick release rod Material:metal Shank:10mm Size:16mm,5/8inch thread Feature: Quick-Connect & Easy Ejection Design: Effortlessly solve material removal challenges after punching, significantly improving work efficiency with rapidly attachment and release. Self-Locking Mechanism for Secure Operation: Turn left to lock firmly and right to release smoothly. The reliable self-locking structure prevents accidental loosening and ensures safety during use. 45# Manganese Steel Construction: Made of high-strength 45# manganese steel for enhanced durability and long-lasting performance in demanding drilling applications. Compact & Lightweight with Compatibility: Weighing only 343g with a total length of 192mm and a 10mm hex shank, it is hand drills, cordless drills, bench drills, and more. Dual Thread Sizes for Versatile Use: Supports both 16mm and 5/8-inch threads, making it good for use with bi-metal hole saws and pipe opener. Package content: 1 x quick release rod