Blue Spot Tools 14124 3 Piece 1/4" Magnetic Bit Adaptor Set

Amazon

Manufactured from carbon steel for increased durability & shock. Carbon steel is extremely strong and shock resistant. The magnetic ends are for use with 1/4" hex bits. The set comes in three different sizes 50mm, 100mm & 150mm. The adaptors have a magnetic end for secure fitting., Manufacturer: BlueSpot

Zoro Tools

The BlueSpot 3 PCE Magnetic Hex Bit Holders are manufactured from carbon steel for increased durability. The magnetic ends hold bits securely. Ideal for use with hard to reach screws. For use with any 1/4" hex bits. Sizes: 2", 4", 6".