Features 1.Flexible Shaft Drill Bit Extension,Power Tools Screwdriver Set Extenders,Extention Screwdriver 2.This bit extension can be used for general formula hand drill chuck 3.Flexible Drill Bit Length: about 290mm 4.Drill bit shaft adopts flexible out shield protects your hand while inside shaft rotates. 5.Flexible Shaft Features: 1.Flexible Shaft Drill Bit Extension,Power Tools Screwdriver Set Extenders,Extention Screwdriver 2.This bit extension can be used for general formula hand drill chuck 3.Flexible Drill Bit Length: about 290mm 4.Drill bit shaft adopts flexible out shield protects your hand while inside shaft rotates. 5.Flexible Shaft Specification: Product including: 1 quality of the Flexible shaft/ connecting link Length: about 290mm Connection hex shank drill site size 6.35mm (1/4) Connecting parts of the batch Hex size 6.35mm (1/4) Package Includes: 1 x Flexible shaft Shaft only, others not includes!!! Package List