KBC Tools 1-130A-032 USA Straight SH. Expansion Reamer, Steel, 1/2"

Expansion Chucking Reamers. Recommended for reaming abrasive materials and as the diameter wears down, the reamers can be expanded many times by tightening the end adjusting screw and regrinding to its original size. This procedure can be repeated several times. Expansion reamers should not be expanded to use at diameters larger than listed nor be considered as adjustable for use in producing holes of several sizes. The expansion screw should never be loosened.