Abstract: A glass cutter and an accessory to allow circular cuts are disclosed. The glass cutter includes a barrel having an axial opening formed of two sections: a smooth and a tapped section, a tapered holder for releasably securing a cutter wheel in the barrel's smooth section, and a spring-biased shaft to be secured within the tapped section and provided with a finger control member. Preferably, the shaft is axiably adjustable. Preferably, the barrel has a knurled outer periphery. Preferably, the holder is formed of stainless steel and the remaining parts are of aluminum.