24" x 4" Straight Arrow Serrated Concrete Groover, 1 1 2" Deep Bit Crain Vinyl Welding Tool Kit radius to prevent chipping of Superior 3 Tile Cutter radius to prevent chipping of concrete Cuts control joints in concrete Closed bit prevents build up in tool Designed for grooving diagonally from wall to corner Square back works along forms and walls Low surface friction so groover moves faster across the surface Blade grips to surface preventing downward drift on slopes Impact resistant for extended wear in rough use Chemical 10" working table on the right side and 4" on the left side The 1 1 2" deep bit tapers from 1 4" to 1 8" within the groove to direct the stress on the concrete to the joints and prevent cracks The deep groover is popular for decorative applications