16 splines down the hole bits

{"cid":"91212094","title":"Drilling Tools DTH Button Bits with 10-16 Splines and Carburizing Treatment","imgUrl":"https:\/\/img.chinax.com\/nimg\/cb\/0d\/c6da3149821c1b9e1854b1a2ded4-200x200-1.jpg","attrs":{"Price":"99-9999USD\/PC","Brand Name":"KINGDRILLING","Model Number":"Bit 165mm-DHD350","Minimum Order Quantity":"1PC","Delivery Time":"20-25 days","Place of Origin":"CHINA","Certification":"ISO9001","Packaging Details":"Standard","Payment Terms":"T\/T","Supply Ability":"20000PCS \/MON","Spline Key Number":"12","Shank Type":"COP44\\HD45\\DHD340\\QD45","Packing":"Wooden Case","Product_Thread Connection":"API 2 3\/8","Product_Weight":"2.5 Kg - 20 Kg","Applications":"Drifting, Tunneling","Carbides Shape":"Spherical, Ballistic, Simi-Ballistic","Weight":"9-12kgs"}}

{"cid":"91202120","title":"QL80 Shank DTH Drill Bit with 2 Flushing Holes and Air Tube for Efficient Rock Drilling in Mining and Construction","imgUrl":"https:\/\/img.chinax.com\/nimg\/33\/40\/ff12f16803ce1d55cfe5f6ed0cc3-200x200-1.jpg","attrs":{"Price":"$3-$300","Brand Name":"MTH","Model Number":"QL80 Shank Bit","Delivery Time":"7-12 work days","Place of Origin":"CHINA","Certification":"ISO9001","Packaging Details":"Wooden case","Payment Terms":"T\/T,Western Union","Spline":"16","Name":"QL80 DTH Bit","Face Type":"Flat Front","Colour":"Customized","Weight":"Carbide","Process":"CNC","Tube":"With Air Tube","Flushing Holes":"2"}}

{"cid":"91182652","title":"100mm 3 15\/16'' DTH Drill Bits With Convex Face","imgUrl":"https:\/\/img.chinax.com\/nimg\/68\/49\/8e546e91b879e88c29e5ee9df3db-200x200-1.jpg","attrs":{"Price":"negotiable","Brand Name":"SOLLROC","Model Number":"Cop32","Minimum Order Quantity":"1 piece","Delivery Time":"18 working days","Certification":"SGS","Place of Origin":"China","Payment Terms":"T\/T, ","Supply Ability":"10000 pieces\/month","Packaging Details":"Cartons + ply wood case (no plastic)","Application":"Quarrying, construction, civil engineering, mining,","Usage":"mining, water well drilling, geothermal drilling","Product name":"Cop32 DTH Bit","Rock formation":"Granite, limestone, quartz, etc","shank":"Cop32","Advantage":"Hign Abrasion Resistance","Color":"Black or as request","Size":"3 15\/16''","Bit diameter":"100mm","Rock hardness":"Granite, limestone, quartz, etc","Machine type":"Drilling Tool,Drilling Equipment,Downhole Tools,Mining machine parts","Use":"Well Drilling,Ore Mining,Coal Mining,Coal\/Ore Mining,quarry"}}