Check the listing for details. Columbia Inside Drywall Corner Applicator w/ 4 Wheels. Condition: New. Listed at 79.00 USD. Columbia Inside Drywall Corner Applicator w/ 4 Wheels Columbia Inside Corner Applicators are all machined from solid aluminum billet. They are very accurate and their Delrin wheels glide along the wall. Offered in two and four-wheel designs. FEATURES:The one-way model is offered with two wheels or four wheelsHand made from U.S. aluminum and steel componentsMachined in Canada Al's Taping Tools is the Largest Drywall Tool Store in the World! We are also a fully equipped automatic drywall tool service center with over 30 years in the industry. We sell and service all major brands of automatic drywall tools. All of our service techs are also fully trained in the operation of the tools that we sell and service. So if you are new to automatic drywall tools or have any questions, please give us a call or send us a message. We are here to help. Al's Taping Tools & Spray Equipment815 Tower DriveMedina, MN 55340