The bit extension frame is made of high-quality steel, and structure ensures maximum efficiency. The chrome-plated surface of the drill clamp increases the rust resistance. It can be used for drivers, making this extension stand very convenient and flexible. Hard steel bracket, durable, durable structure, long service life. Expand all kinds of screwdriver bits. The screwdriver bits are converted to universal 1/4 inch (about 0.6 cm) fast hexagonal handle and 1/4 inch (about 0.6 cm) hexagonal sleeve, which is suitable for most electric screwdrivers, hand- screwdrivers and drills. Small and portable, easy to carry around. Suitable for the transfer of drill bits, screwdrivers and batch heads. Describe Name: Keychain Connecting Rod Set Material: steel Color: As Shown Package Contents: 1 x Keychain connecting rod set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.