Kigauru 2 Pcs Self-Locking Drill Bit Holder 60mm Length Extension Rod Screwdriver 1/4 Inch Hex Shank Quick Release Chuck Adapter Connector Power Drill Tool with 1 Pcs Automatic Center Punch Tool

description Size: Length: 60mm, Hex Socket Diameter: 1/4 inch (6.35mm), Hex Shank Diameter: 1/4 inch (6.35mm). Automatic Center Punch Tool: Length: 128mm, Diameter: 12.7mm, Thimble Diameter: 0.6mm. Material: Self-locking drill bit holder. Made of premium stainless steel for high strength and hardness, durable for long time. The automatic center punch. Made of a carefully processed brass body, hardness up to HRC58°-65°. The impulse provided to the point of the punch is quite repeatable, allowing for uniform impressions to be made. Practical: Its surface gas deep knurling, which means it will not slide and provide more precise handling and control. When pressed against the workpiece, it stores energy in a spring, eventually releasing it as an impulse that drives the punch, producing the dimple. It performs the same function as an ordinary center punch but without the need for a hammer. Quick Release Bit Holder: This drill bit holder extension is non-magnetic. Interface has a locking mechanism for one-handed quick release. It has a built-in stability lock and high-efficiency spring, press down can release the ejection bit, realizing quick replacement in one second. Excellent concentricity can greatly improve work efficiency. Widely Application: Designed for 1/4 inch hex shank bits, suitable for electric drills, screwdriver, batch head and other to transfer, to extend various screwdriver bits and screwdriver head conversion uses. Automatic center hole punching is suitable for various tasks, such as marking on materials, car emergency tools, other emergency hammers, iron plate positioning, wood positioning, wall positioning, etc. See more product details