Versatile ER11 Collet Set in 15 Sizes Benefits - Wide compatibility: ER11 spring collet set for drilling, milling, tapping, engraving, grinding, CNC work, and spindle machines. - Large size range: includes 15 sizes for versatile toolholding with common metric sizes and a 1/4 inch option. - Easy to identify: each ER11 collet is individually labeled and packaged for quick access and tool selection. - Durable and precise: made from high quality 65 Mn spring steel with stable performance, fine workmanship, good elasticity and high precision. - Compact and accurate: height 18 mm (0.7 in), outside diameter 10 mm (0.39 in), runout tolerance < 0.008 mm. Specifications (selected) - 15 sizes included (metric sizes and 1/4 inch option) - Height: 18 mm (0.7 in) - Outside diameter: 10 mm (0.39 in) - Runout tolerance: < 0.008 mm Use scenarios - CNC milling or drilling of metal or plastic parts, where precise toolholding and low runout improve surface finish and accuracy. - Engraving or fine tapping on small components, ensuring stable grip and consistent results. - Fine grinding or deburring of delicate parts, maintaining alignment and reducing tool chatter. Material and performance - Constructed from 65 Mn spring steel for durable performance, reliable elasticity, and high precision across common machining tasks.