Product Detail: 90mm length Hexagonal handle drill chuck Clamping range: 0.3 mm-6.5 mm with 1/4"(6.35 mm) Black 57 mm length Hexagonal handle drill chuck Clamping range: 0.3 mm-3.6 mm with 1/4"(6.35 mm) Black 61 mm length Round handle drill chuck clamping rang:0.3 mm -3.4 mm with 1/8" (3 mm )shank White 59 mm length Round handle drill chuck clamping rang:0.3 mm -3.4 mm with 1/16" (2.35 mm )shank White