Crain 968 Floor Following Power Groover maintains consistent grooving depth even when floors are not level, up to 1/8" of variation over one foot of seam-line. The floor following wheel rides on the floor to raise or lower the blade in response to variation. A spring-loaded floor following dust shroud improves dust control. Crain 968 Floor Following Power Groover kit includes a 12 tooth 130 mm x 3.3 mm wide carbide-tipped blade (No. 971), and carrying case. Diamond grit blade for metal-impregnated safety floors is sold separately (No. 972). 110VAC 9A No load RPM 12,000. Max. groove depth 3.5 mm. Net weight: 20.5 lbs.