Description: Fully polished treatment makes it very rust-resistant and wear-resistant. High quality and exquisite workmanship make it have low resistance and fast speed. The multi-function feature makes it have a wide range of use. Different specifications make it possible to meet different work requirements. Made of hard alloy material, it is very durable to use. The length of the storage box is 11cm, the width is 5.8cm and the height is 1.2cm. It is a professional glass and tile drill bit that can provide accurate drilling on tiles, marble, thin iron plates, mirrors and glass. Remember to add water or coolant when drilling. Item Name: Triangle Drill Bit Material: Hard Alloy Color: Black Features: Widely Used, Low Resistance, Cross Head 1: 3mm, 4mm, 5mm, 6mm, 7mm, 2: 5mm, 6mm, 8mm, 10mm, 12mm, 3: 6mm, 6mm, 8mm, 10mm, 12mm, 4: 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 5: 5mm, 6mm, 6mm, 8mm, 10mm, 12mm Size Details: Box Size: 11cm x 5.8cm x 1.2cm/4.33" x 2.28" x 0.47" (Approx.) 3mm: Total Length: 7cm/2.76", Drill Bit Head: 0.3cm/0.12" (Approx.) 4mm: Total Length: 7cm/2.76", Drill Bit Head: 0.4cm/0.16" (Approx.) 5mm: Total Length: 7.6cm/2.99", Drill Bit Head: 0.5cm/0.2" (Approx.) 6mm: Total Length: 7.7cm/3.03", Drill Bit Head: 0.6cm/0.24" (Approx.) 7mm: Total Length: 8cm/3.15", Drill Bit Head: 0.7cm/0.28" (Approx.) 8mm: Total Length: 8cm/3.15", Drill Bit Head: 0.8cm/0.31" (Approx.) 10mm: Total Length: 8.3cm/3.27", Drill Bit Head: 1cm/0.39" (Approx.) 12mm: Total Length: 8.3cm/3.27", Drill Bit Head: 1.2cm/0.47" (Approx.) Shank Diameter: 0.625cm/0.25" (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: 1: 5 x Triangle Drill Bits (3mm, 4mm, 5mm, 6mm, 7mm) or 2: 5 x Triangle Drill Bits (5mm, 6mm, 8mm, 10mm, 12mm) or 3: 5 x Triangle Drill Bits (2Pcs 6mm, 8mm, 10mm, 12mm) or 4: 6 x Triangle Drill Bits (4mm, 5mm, 6mm, 8mm, 10mm, 12mm) or 5: 6 x Triangle Drill Bits (5mm, 2Pcs 6mm, 8mm, 10mm, 12mm)