JTHL is a professional Kelly bar manufacturer, Refurbished used drilling rig, drilling buckets, drilling auger, Casing tube, Tremie pipe www.kelly-bar.com There are lots of model of drilling tools, it depends on the bore d hole diameter, the soil layer condition,and so on. The basic model of drilling tools. Drilling Buckets Drilling buckets, it can be rock drilling buckets, applicable for gravel, pebble, highly or medium weathered rock. Or the soil drilling buckets, applicable for silt, gravel,clay and highly weathered rock. double open or single open drilling buckets, double bottom gate or single bottom gate drilling buckets,the drilling buckets with bullets or soil drilling teeth, with or without center pin drilling buckets. Drilling Auger According to the soil layer condition , it can be rock drilling auger with bullets,location by pilot double or single spiral, applicable for medium weathered rock, bedrock; or the soil drilling auger with drilling teeth, Usually it should be straight auger type, better for carry soil.applicable for clay,high-weathered layer, gravel layer. Core barrel Core barrel can be with bullet teeth,with roller bits, or can be with double shell, actually it can be several models based on the customers need. Open type bucket Large inlet of soil, open shell design, easy to drum spoil so increase the drilling efficiency.applicable for clay,slit, highly weathered rock. More details you need , please search www.kelly-bar.com or email kelly-bar@hotmail.com amy@chianjthl.com MB;86-18210143398