Features 1、Suitable for drilling machines (table drills) and pistol drills, and then with the hole opener 2、Easy to load and unload, because the joint between the water head and the water pipe, the water can enter from the hole opener (drill bit), and the slag generated inside the hole can be easily drained under the pressure of water, reducing the broken friction between the slag and the diamond and the inner wall of the base. 3、The holes are neat, smooth, and have no broken edges, and no tremor 4、Small incision resistance, increased opening speed 5、Easy to decorate after slotting and remove chips 6、Can be used for drilling hard and brittle materials such as glass, ceramics, marble, etc. 7、Widely used in glass, ceramics, jade, agate, shells, etc. Specification Item Type: Water Nozzle Drill Chuck Material: Tungsten Steel Weight: 6x6 (164g) 6x10 (189g) Size: Approx. 10 x 4 x 4cm / 3.9 x 1.6 x 1.6in Package List 1 x Water Nozzle Drill Chuck