awl n 1: a pointed tool for marking surfaces or for punching small holes
Awl \Awl\ ([add]l), n. [OE. aul, awel, al, AS. [=ae]l, awel; akin to Icel. alr, OHG. [=a]la, G. ahle, Lith. yla, Skr. [=a]r[=a].] A pointed instrument for piercing small holes, as in leather or wood; used by shoemakers, saddlers, cabinetmakers, etc. The blade is differently shaped and pointed for different uses, as in the {brad awl}, {saddler's awl}, {shoemaker's awl}, etc. [1913 Webster]
Awl an instrument only referred to in connection with the custom of boring the ear of a slave (Ex. 21:6; Deut. 15:17), in token of his volunteering perpetual service when he might be free. (Comp. Ps. 40:6; Isa. 50:5).