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Overview
Shank: 1/4 inch Hex Shank Size: 4-32mm:4,6,8,10,12,14,16,18,20,22,24,26,28,30,32mm Color: Bronze Material: high speed steel Pay attention: 1. The drilling speed can not be too fast,rotation rate from 250 to 400 is recommended. 2. It is much necessary to add water or coolant to protect the drill. 3. If drilling diameter is 14mm,we recommend to use bench drill. Package Contents: 1 * 4-32mm Drilling Bit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.