System BTA Overview Solid drilling tools with brazed carbide inserts & guide pads with indexable inserts and guide pads Counterboring tools with indexable inserts and guide pads Trepanning with indexable inserts and guide pads Accessories drill tubes connecting chucks vibration damper pressure heads drill bushings spare parts adaptors tool presetter	Type 17 - solid drill head. regrindable, brazed carbide insert and guide pads, head to be brazed onto drill tube diameter range: 7.76 - 15.50 mm Type 18 - solid drill head. regrindable, brazed carbide insert and guide pads, 1-start external connection thread diameter range: 12.21 - 15.50 mm Type 20 - solid drill head, regrindable, brazed carbide insert and guide pads diameter range: 14.51 - 36.99 mm Type 14 - Solid drill head, disposable brazed type diameter range: 17.71 - 65.00 mm