Description: Spiral chip removal design provides fast chip removal and improves hole opening rate. High temperature quenching makes it wear resistance and open holes smoothly. Made of hard alloy, it is durable and compact. The length of this product is 11cm, the max working diameter is 1.2cm. Working diameters are 4mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 8mm, 10mm, 12mm. Round handle has large torque and strong bearing capacity. Straight shank design is suitable for many electric drills and drilling machines. Item Name: Drill Bit Material: Hard Alloy Handle: SDS PLUS Tip: Flat Tip 2 Cutter Drill Body Hardness: HRC45 to HRC48 Carbide Hardness: HRC89.5-HRC90.5 Groove: Double Flutes S4 Size Details: Max Size: 11cm x 1.2cm x 1.2cm/4.33" x 0.47" x 0.47" (Approx.) Working Diameter: 0.4cm/0.16", 0.5cm/0.2", 0.55cm/0.22", 0.6cm/0.24", 0.65cm/0.26", 0.7cm/0.3", 0.8cm/0.31", 1cm/0.4", 1.2cm/0.5" (Approx.) Length: 11cm/4.33" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 9 x Drill Bit