ITEM NAME:8-Piece 0.5-3mm Drill Chuck Collets Set of Quick Chuck for Mini Tools T4Q7 8-Piece 0.5-3mm Drill Chuck Collets Set of Quick Chuck for Mini Tools T4Q7 X5T1 For the a small drill, and after connecting with the motor for PCB circuit boards drilling to do special mini drill Easy to ABS board, wood, sheet aluminum, cardboard punch Adapter drill: 0.5mm-3.0MM Material: copper Color: copper color Package contents: 1x axis 1x copper cap 1x 3.17 mm copper drill folder 1x 0.5mm drill collet 1x 1.0mm drill collet 1x 1.5mm drill collet 1x 2.5mm drill collet 1x 3.0mm drill collet Note: Light shooting 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..1x 0.5mm drill collet. 1x 1.0mm drill collet. 1x 1.5mm drill collet. 1x 2.5mm drill collet. 1x 3.0mm drill collet. For the a small drill, and after connecting with the motor for PCB circuit boards drilling to do special mini drill.