A guide for attachment to a circular saw includes an attaching member, an extension member for slidable movement in a slot defined longitudinally along the attaching member, and an angle guide attached to the extension member. The deodorant composition contains nanoscale antimicrobial particles where the nanoscale antimicrobial particles contain one or more antimicrobial agents and have a particle diameter in the range of from 5 nanometers to 500 nanometers. The first thread has a first pitch and the second thread has a different second pitch. The first and second pumps can be disposed in a common block housing and the common block housing can define a fluid path extending from the outlet of the second pump to the inlet of the first pump. The battery exhibits a large discharge capacity and improved discharge capacity characteristics after a number of discharge-charge cycles and does not cause internal short-circuiting.