11.5mm Cemented Carbide Twist Drill Bit for Stainless Steel Copper Aluminum 2Pcs 13mmx39mmx2m The big head is the

The big head is the receiver

Insert spring Nut anywhere along the length of the channel and attach the fitting to combine another channel a 90 degree turn

Head Style: Flat Knurled Head

Feature hardened

11.5mm Cemented Carbide Twist Drill Bit for Stainless Steel Copper Aluminum 2Pcs 13mmx39mmx2m The big head is theSpecification: Size: 11. 5mm 0. 45" Full Length: 110mm 4. 33" Flute Length: 60mm 2. 36" Shank Diameter: 10mm 0. 39" Tip Material: Cemented Carbide Shank Material: HSS (High Speed Steel) Descriptions: 1. Twist drill bits are made of cemented carbide tip for long service life, it is more sharp and durable than others. 2. Milled U flutes with deep cut spiral provides fast material removal. Suitable for drilling in tough metal, including abrasive alloy