Klein Tools Hard Hat 60249 Blue Non Vented Full Brim Safety Helmet (Class E 20kV Type 1 6 Point Ratchet Suspension ANSI Z89 1 PC ABS) Submersible Pump and corrosion to reduce cutting and corrosion to reduce cutting drag this rotary tool utilizes a multi collet system accepting 1 8 inch Class E Dielectric Protection: Solid non vented shell design tested up to 20 kV in compliance with ANSI Z89 1 15 Type 1 Electrical Isolation Rating Class E (Tested up to 20 kV Dielectric Voltage) Helmet Brim Style Full Brim (360 Degree Coverage) Shell Venting System Non Vented Solid Shell Suspension System Mechanism 6 Point Open Frame Ratchet with Pivoting Neck Pad Hat Size Adjustment Range Head Sizes 6