Diy crafts 0 5-3mm mini brass collets chucks twist drill fit 3 17mm motor shaft 0.5-3mm mini brass collets chucks twist drill fit 3.17mm motor shaft 6pc, set 0.5-3mm mini brass collets chucks for twist drill fit 3.17mm motor shaft features 100% high quality and brand new. Used for 3.17mm motor shaft. Excellent workmanship 0.5-3.0mm drill collet go with twist drill as a mini hand drll for abs board, aluminum sheet, paperboard drilling specification material: brass drill collet size: 0.5mm, 1.0mm, 1.5mm, 2.5mm, 3.0mm 65292;0.5mm overall length :18mm the shanksize :4.8mm(please see the photo) diameter of backshaft (match the motor shaft): 3.17mm package includes 1x l wrench 1x copper cap 5x brass collets (packed safely in bubble bag.) diy crafts 0 5-3mm mini brass collets chucks twist drill fit 3 17mm motor shaft diy crafts