[DETAIL] Features: Suitable for many electric drills and drilling machines Suitable for wood, aluminum, plastic, etc. Specifications: -Material:?high speed steel -This extra long twist drill bits can be used for more convenient drilling. -Straight shank design is more suitable for many electric drills and drilling machines. -Made of high speed steel(HSS), durable and compact. Size 5Pcs/150mm:2mm��3mm��3.5mm��4mm��5mm 8Pcs/200mm��4mm��4.2mm��4.5mm��5mm��5.2mm��6mm��8mm��10mm [ATTRIBUTES] - Hign-concerned Chemical: None - Brand Name: conboom - Origin: Mainland China - Hign-concerned Chemical: None - Brand Name: conboom - Origin: Mainland China - DIY Supplies: Woodworking - Material: High Speed Steel - Type: Twist Drill Bit - Use: Wood Drilling - Length: 150mm/200mm