Features: - Polished surface finish, good finish. - Removed chip fast, drilling hole fast. - Drill bit for use with pocket hole joinery. - Mainly used for wood, MDF, MDF, particleboard opening hole. - Replacement twist step drill bit fits for manual-pocket hole system. - Bit is suitable for drilling wood, plastic, soft metal aluminum and iron etc. - Drilling steady, high efficiency, hole wall is smooth and chip evacuation unobstructed. - Dedicated to open the sliding door frame hole, for door frame processing,s liding door mullion processing, iron products, auminum alloy, wood, light alloy processing. Specifications: Material: High Speed Steel Type: Twist Drill Bit Use: Wood Drilling Type Shank Diameter Front Diameter Total length 4-8mm 8mm 4mm 118mm 5-9mm 9mm 5mm 125mm 6-10mm 10mm 6mm 130mm Package Included: 1 x Twist Step Drill Bit 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.