Condition: Brand New Body is made of mild steel. Jaws are made of Alloy Steel Grade EN31 The Jaws are hardened & Ground. Used for threading a drilled hole at a machine location, without actually moving the work piece. Tapping accessory for drill presses & lathes. Ensures identical center-line of the tap & the drilled hole. Capacity 3/32" to 1/4" ( 2.38 to 6.35 mm) Capacity 1/4 "to 1/2" (6 to 12 mm) Qnty 2 Pcs.