1. Dedicated to convert the grinder into a hand electric drill, realizing one machine for multiple purposes. 2. Made of High-carbon steel, high hardness, anti-rust, high toughness, high and durability. 3. Three- chuck for clamping, suitable for 100mm grinder 4. High-speed rotating, to grind, cut, and polish metal components. 5. Applicable for drilling glass, metal, stone, tile etc. materials. Range of use: 100mm grinder Blessing range: 1.5-10mm Thread specification: M10x1.5 coarse thread Main purpose: Convert the grinder into a hand electric drill to realize one machine with multiple functions. Material:metal colour:Silver Package Contents: 1 x Drill Conversion Collets Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.