Electromagnetic Base Drilling System, 1 2 in Jacobs Chuck, 450 rpm no checkout Durable cap with pocket clip Durable cap with pocket clip for convenient storage Fast drying Heavy duty plastic barrel features ergonomic design for extended use Ink formulated for industrial strength usage Versatile tapered chisel tip makes 1 16" and 3 16" marks 4 canvas Heat resistant hard leather bottom Web loop for sliding over a belt Height in front is 12 in Quick and easy adjustable head position Heavy duty magnetic holding power Twist drills up to 1 2 in dia and is easily mounted with the supplied chuck and adaptor Integrated coolant system High quality construction