This Vaunt X 3 Piece Bi-Metal Impact Holesaw Set features an enhanced design for easy cutting and has been built to last. The 0.6mm thin walls allow for less resistance and strain on tool motors, prolonging your tools battery life. The shallow cup designed for thin materials is made from 8% cobalt for extra strength, longer life as well as greater heat resistance. Complete with a 1/4" quick switch hex shank that allows you to quickly switch from chuck to driver to holder with ease and speed. Key Features 0.6mm thin walls Designed to prolong tool battery life Ejection spring auto ejects slugs 8% Cobalt, bi-metal construction Set contains: 20mm Holesaw 25mm Holesaw 32mm Holesaw Canvas storage case