Upgraded Dry Drilling Design : Drill Bit integrated with wax lubricant inside which melts while dry drilling and cools the cutting ; Water can be used as additional cooling to prolong the life of the bit. plating can prevent the drill bit from rusting
Wildly Application: dry drill set can be applied for drilling clean holes to hard materials, which especially fits well for tiles, porcelain ground, ceramic glass mirror marble stone masonry brick and so on; Note: to wood.
Widely Compatibility: black drill is designed in Hexagon Shank, which is compatible with most machines, such as hand drill, angle grinder, bench drill, also can be matched with side flutes help to remove debris and drill holes smooth and fast; Depth mark is also useful for precise project.

Shank: Hexagon Shank
colour: black
Material: Coated, Alloy

Package Contents:
2 x 3/16 inch (5mm) drill bits diameter
1 x 1/4 inch (6mm) drill bits diameter
1 x 5/16 inch (8mm) drill bits diameter
1 x 3/8 inch (10mm) drill bits diameter
1 x 1/2 inch (12mm) drill bits diameter