Screwdriver bit holder King Tony 4148, magnetic bit holder for 1/4" hex bits, model 4148

King Tony 4148 is a magnetic screwdriver bit holder designed to accept standard 1/4" hex bits and serve as a reliable adapter between a driver, extension or ratchet and interchangeable bits. Manufactured from chrome vanadium alloy steel with a polished chrome plating, the tool provides a compact, corrosion-resistant connection that keeps bits aligned and held during assembly, maintenance and repair operations.

Advantages

The magnetic tip secures bits and reduces accidental drops, while the chrome vanadium construction offers strength and wear resistance for frequent use. Polished chrome plating improves corrosion protection and allows smooth insertion and removal of bits. The 1/4" hex interface ensures compatibility with a wide range of standard screwdriver bits and accessories, simplifying tool sets and reducing bit loss during work.

Suitable for

• General assembly and disassembly of mechanical and electronic components
• Maintenance and repair tasks in workshops and garages
• Use with power drivers, manual drivers and extensions that accept 1/4" hex bits
• Situations where magnetic retention of small fasteners or bits is beneficial

Key specifications

• Accepts 1/4" hex bits
• Magnetic tip for bit retention
• Material: chrome vanadium alloy steel
• Finish: polished, chrome plated
• Compact bit holder design for use with drivers and extensions

How to use

Insert a compatible 1/4" hex bit into the holder until it seats against the magnetic tip. Attach the holder to a driver, extension or ratchet with a matching interface and verify the bit is secure before applying torque. When changing bits, pull the bit straight out from the magnetic tip. After use, wipe the holder clean and store it with other bits to prevent loss or damage.

Usage recommendations

Use the King Tony 4148 with bits that match the intended screw head size to avoid cam-out and premature wear. Avoid applying excessive impact force beyond the holder’s intended use; if used with impact drivers, verify compatibility with the driver manufacturer’s guidance. Regularly inspect the magnetic tip and chrome plating for wear or corrosion and replace the holder if deformation or significant wear is observed.