Features:Preferred material: S2 alloy material is used, which is hard, wear-resistant and durable.Specification: 25-150mmVariety of suits: 3/4/5/7/11 pieces of special equipment in different suits to meet your different needs.Features: high strength / high endurance / wear resistance / non-slipScope of application: rechargeable drill / electric hand drill / hand drill / wind batch Package Includes:1 Set Cross Bits Specifications:Material:S2 Alloy SteelColor :BlueSize: Approx. 25-150mm/0.98-5.9inch note:1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.