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Zzanggu 13Pcs HSS Titanium Coated Twist Drill Bit Set 1.5mm - 6.5mm, 1/4" Hex Shank, Quick Change Drill Bits 【Specification】 [1] Type: 1.5-6.5mm Twist Drill Bit [2] Material: HSS / High Speed Steel 4241 [3] Surface Finish: Titanium Coated [4] Shank Diameter: 1/4" hex shanks 【Features】 [1] Made of high speed steel 4241 with titanium coated, reduces friction and over-heated [2] General purpose HSS wire gauge straight shank jobber length bits [3] Split point tip and twist design, increases cutting speed with self-centering and prevents walking, clears chips and particles faster [4] Drill bits drill exact-sized holes for tapping applications 【Applications】 [1] Used on Iron Plate, Aluminum, Wood and Plastic, etc. [2] Suitable for most power tools,like Bosch GBM350RE,etc [3] Good for automotive, maintenance and repair, portable drills and stationary drill press applications ★★ NOTE ★★ At the trepanning, please wear good protective measures, in case of chips splash damage eyes. 【Package Include】 13 Drill Bits: 1.5mm (1/16inch) 2mm (5/64inch) 2.5mm (3/32inch) 3mm (7/64inch) 3.2mm (1/8inch) 3.5mm (9/64inch) 4mm (5/32inch) 4.5mm (11/64inch) 4.8mm (3/16inch) 5mm (13/64inch) 5.5mm (7/32inch) 6mm (15/64inch) 6.5mm (1/4inch)