The Keystone Seats KS77819 seat safety switch is a 2-prong, 2-wire, normally open operator presence switch designed for use on mower, tractor, forklift, and equipment seats that require this switch style. The switch features an integrated rubber dust-seal boot that helps protect the internal mechanism from dirt, debris, and moisture, which are common causes of premature failure in exposed plunger-style seat switches. Rated for 50V DC and 2 amps, this CE-certified switch is built to meet the electrical requirements of many OEM seat safety circuits and helps restore proper operator presence functionality so equipment operates only when the operator is seated. The push-in plastic body allows for fast clip-in installation with no mounting hardware required; switch only, no wiring harness included. Keystone Seats KS77819 is an aftermarket replacement compatible with the following part numbers: Delta 6440-04; Ariens 02754100 and 03086600; AYP 160784 and 532160784; Briggs & Stratton 1732004; Bush Hog 50048610; Cub Cadet 725-3167 and 925-3167; Dixie Chopper 902602; Dixon 539107523; 82-2190; Gravely 02754100; Great Dane AM103119 and D38001; Husqvarna 532160784 and 539107523; Jacobsen 4217502; AM103119; Kubota K1122-62280 and K1122-62282; MTD 725-3167; Scag 481638; Simplicity 1704379, 1704379SM, 21704379, and 21704379SM; Snapper 1-5707, 1732004SM, 7015707, and 7015707YP; Stens 430-413; Toro 82-2190; Worldlawn 353048; and Wright Manufacturing 52410002 and 52410003. Compatibility depends on seat design, connector type, and safety system requirements, so verify your existing part number and switch style before ordering.