H5*100*D3*60*1# 5mm hex shank screwdriver bit, length 100mm, stepped down to Ø3 round tip length 60mm, 4-point tip size 1#

H5*100*D3*60*1# 5mm hex screwdriver bit, 100mm length, stepped down to 3mm round shank x 60mm length, Phillips 1# tip

Used for torque-controlled screwdrivers.

S2 steel material