1. Material:Brass 2. 0.5-3.0mm drill collet 3. Excellent workmanship 4. Ideal for combined use with a hand drill or electric drill,to drill ABS,wood board,presspaper,etc. 5. Package include: 1x drill chuck, 5x drill collet, 1x drill chuck keysSpecification: General Material Brass Package Weight One Package Weight 0.03kgs / 0.07lb One Package Size 10cm * 5cm * 2cm / 3.94inch * 1.97inch * 0.79inch Qty per Carton 100 Carton Weight 3.60kgs / 7.94lb Carton Size 27cm * 22cm * 22cm / 10.63inch * 8.66inch * 8.66inch Loading Container 20GP: 2040 cartons * 100 pcs = 204000 pcs 40HQ: 4737 cartons * 100 pcs = 473700 pcs