4 in. 285 lbs. Capacity Polyurethane Double Ball Bearing Swivel Plate Caster with Brake (4 Pack) Accordion doors Reversible hook allows tool to Reversible hook allows tool to remain close by accurate set up Integral dust collection system efficiently removes chips and provides superior bit visibility Spindle lock button allows for single wrench bit changes Innovative rubber coated knobs have plunge lock and on off built in for maximum user control 10 amp motor uses state of the art circuitry for soft starts and smooth operation Guide bushing adapter plate accepts standard guide bushings for template work Wheels measure at 4 in Remember when you had the perfect wheels