Product Description:DTH hole openers are used to enlarge the size of a pilot hole most commonly used in industrial applications. Benefits of drilling a smaller pilot hole and then using a hole opener are:Wear pads, back reamer buttons, and or buttons on the pilot can be added for an additional fee.T......
| OPENER DIAMETER(MM) | HEAD DIAMTER (MM) | GAUGE | FRONT | SHANK |
| 82 | 14 | 14 | DHD340 SD4 COP42 | |
| 178 | 99 | 16 | 14 | |
| 190 | 115 | 16 | 14 | DHD350 SD5 COP52 |
| 216 | 138 | 16 | 14 | |
| 254 | 159 | 16 | 14 | DHD360 SD6 COP62 |
| 305 | 208 | 16 | 16 | |
| 381 | 296 | 16 | 16 | SD10 NUMA100 |
| 445 | 305 | 18 | 16 | |
| 482 | 311 | 18 | 16 | SD12 NUMA120 |
| 660 | 445 | 19 | 18 |




Q1: Can I have a sample for testing?
A:Samples are still to be paid but discounted price can be provided.
Q2: Do you have the inspection procedures?
A:100% strict inspection and testing for every order before packing.
Q3: How can i get the after sale services?
A:Free replacement will provide once the problems casued by our product quality.
Q4: Can I have a visit to your factory before the order?
A: Sure, welcome, here is our address: Yantai, Shandong.
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