57mm down the hole hammer

{"cid":"91121595","title":"57mm QL80 Hammer Dth Drilling Tools Reverse Circulation Forging Casting","imgUrl":"https:\/\/img.chinax.com\/nimg\/0d\/ef\/ee723f8b88a0d8bfbfeffe8a9edb-200x200-1.jpg","attrs":{"Price":"Negotiate","Brand Name":"ROSCHEN","Model Number":"8 INCH","Minimum Order Quantity":"Negotiable","Certification":"ISO","Place of Origin":"CHINA","Supply Ability":"10000 sets","Packaging Details":"poly wooden box","Name":"Dth Drilling Tools","Size":"8 Inch","Material":"High Manganese Steel","Processing Type":"Forging, Casting","Use":"Ore Mining, Water Well, Gas oil drilling","Diameter":"57mm to 660mm"}}

{"cid":"91160503","title":"2 Inch 2.5 Inch 3 Inch R32 Button Drill Bit Hole Cutting Drill Bit","imgUrl":"https:\/\/img.chinax.com\/nimg\/1d\/9f\/99b1c177ef8407467da58e6e8c34-200x200-1.jpg","attrs":{"Price":"$500","Brand Name":"Jinquan","Model Number":"Threaded & Tapered","Minimum Order Quantity":"1 Piece","Delivery Time":"Within 15 days upon receipt of your 30% deposit","Place of Origin":"China","Certification":"ISO9001:2008","Bit Diameter":"48mm, 51mm, 57mm, 64mm, 70mm, 76mm","Other Names":"R32 Button Bits,Threaded Button Bits,Button Bits,Button Drill Bits,Ballistic Button Bits","Material":"Alloy Steel Bar 45CrNiMoV and Tungsten Carbide Tips YK05","Processing Type":"Forging","Technology":"Heat Treatment","Application":"Hard Rock Drilling, Mining, Quarrying, Stoning, Construction","Colour":"Gold, Black, Red, Blue, Yellow","Packaging Details":"Ply-wooden cases or Iron bundles","Payment Terms":"T\/T, Western Union, Paypal, L\/C At Sight","Supply Ability":"100,000 pcs per month"}}