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Using for processing and drilling(twist drill bits even can be using for electric drilland harder soft metal Tap Style: Plug 4pc thread tap details as below M3,Pitch: 0.5 Overall Length: 5.0cm Thread Length:2.1cm M4,Pitch:0.7 Overall Length: 5.7cm Thread Length:2.2cm M5,Pitch:0.8 Overall Length: 6.5cm Thread Length:2.6cm M6,Pitch:1.0 Overall Length: 6.8cm Thread Length:2.8cm 4pc Twist Drill details as below: Diameter:2.5mm Max rotate speed:1400-1800 RPM Overall Length:5.6cm Thread Length:3.0cm Diameter:3.5mm Max rotate speed:1000-1400 RPM Overall Length:6.9cm Thread Length:4.0cm Diameter:4.2mm Max rotate speed:800-1000 RPM Overall Length:7.4cm Thread Length:4.2cm Diameter:5.2mm Max rotate speed:700-800 RPM Overall Length:8.4cm Thread Length:5.2cm Package Includes: 4 x Thread Tap 4 x Twist Drill bits 1 x tap Wrench