3 4 in Drive Ratchet, Round, 42 in, Black no checkout allows mask to hang down allows mask to hang down around the user's neck when not in use Ventex® valve lets the hot air out faster so workers breathe easier and stay cooler R95 protection against both oil and non oil based particulate aerosols Added carbon layer helps filter out nuisance levels of ozone organic vapors Soft foam nose cushion for added comfort and no pressure points to form your own burning guides Blocks are machined from aluminum and have grooves on three sides Included are set screws to easily adjust blocks on straight edges or squares Options available for one On Off magnetic block (MSB201) or two On Off magnetic blocks (MSB202) one piece handle Handle design allows operator to “feel” the fastener Precision machined 45 tooth head gives long life and short arc swing Kit is easily removed for cleaning or replacement Drop forged