General description 13 damaged nut and bolt puller with spiral cutting teeth provides a reliable grip to remove round or damaged bolts. This tool is suitable for removing damaged and rusted nuts and bolts, making it an essential tool for unscrewing screws and nuts. You receive a complete set (13 pieces) of screw removers, which can meet your daily use needs. Technical specifications Name: Screw Remover Kit Material: Chrome molybdenum steel Quantity: 13 pieces Specification: 3/8 (10mm) Measurement allowed error: +/- 1-3cm Compatibility and accessories Can be driven by metric wrench or socket Other information Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing.