This bit extension rod set is made from reliable high carbon steel material, with a sturdy construction for maximum durability. Come in different sizes, offering nice choices to meet your daily use and replacement needs, which can bring you lots of conveniences. Features -Color:Silver -Material:High carbon steel -Size:15.00X0.64X0.64cm/5.89X0.25X0.25in -Size:10.00X0.64X0.64cm/3.93X0.25X0.25in -Size:6.00X0.64X0.64cm/2.36X0.25X0.25in -Length Specification: 150mm, 100mm, 60mm - Portable and professional, security. The magnets extension rods hold drill bits securely in place. - Provide you with different lengths to be used, and they are compatible with 1/4 inches drive adapters. - Manufactured with durable high carbon steel material, with excellent durability and practicality. - Feature reinforced structure, increase the contacting areas, which can increase security. - They can be applicable for pneumatic screwdrivers, electric screwdrivers, and more. Package list: 1 x bit extension rod 150mm 1 x bit extension rod 100mm 1 x bit extension rod 60mm