1. 98 models of batch heads. whether it is your regular equipment or DIY, you can meet your needs 2. Chrome vanadium steel material, precision workmanship 3. Magnetic batch heads 4. Size: 17.6 x 9.2 x 5.5cm 5. Professional and practical, compact and portable. 6. Easy and convenient to carry and use 7. Professional repair tools aim to giving assistance during devices repairing