[DETAIL] Description Report Item Product information Features: Tools used: pistol drill, table drill. Cooling with water while working can effectively extend the service life of the drill bit. It is recommended to drill at a speed of 250-400 rpm Specification: 3-12/mm4-12mm/4-20mm/4-32mm Surface treatment: Titanium plating Specification:(Please refer to the details page below for specifications and dimensions) Package included: Titanium plated hexagonal straight groove small 3PC cloth bag (3-12/4-12/4-20mm) * 1 Titanium plated hexagonal straight groove large 3PC cloth bag (4-12/4-20/4-32mm) * 1 Titanium plated hexagonal straight groove 4-32mm * 1 Notes: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture. View more [ATTRIBUTES] - Hign-concerned Chemical: None - Origin: Mainland China - Certification: CE - Hign-concerned Chemical: None - Origin: Mainland China - Certification: CE - DIY Supplies: Woodworking - Type: Center Drill Bit