1.Plastics shell ,lightweight,sturdy and durable. 2.Easy to clamping. 3.competitive price 4.The warranty is 12 month Keyless Hand-tightening Drill Chucks JT1.Plastics shell ,lightweight,sturdy and durable.2.Easy to clamping.3.Aesthetic and practical design of surface ModelCapacity (mm)MountsD(mm)L1(mm)L(mm)J1710K0.8-103/8-24UNF415464J1710D0.8-101/2-20UNF415464J1713K1.5-133/8-24UNF436275J1713D1.5- ...