Sherlock Wideboy features extra-strength wing nut design to adjust and hold the frame arms. Simply loosen wingnuts, slide the arms to the desired width, insert the roller cover, then tighten wingnuts. Works with 12" to 18" covers and R087 and R088 endcaps. Rigid tubular steel resists pressure for excellent results on floors, walls, or ceilings. The Wooster Brush Company has been manufacturing innovative, high-performance painting tools right out of Wooster, Ohio USA since 1851