The main difference is the tool material. 
 The ADO-SUS drill series is carbide and has internal coolant supply specifications. 
 
   internal coolant supply can be used, and it is recommended for customers looking for high-efficiency machining. 
 The EX-SUS drill series is made of high-speed material and has external coolant supply specifications. 
 With a cutting edge that emphasizes sharpness, stable machining can be performed even if the high-speed range is not as high as that for carbide drills. 
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