creating a clean 1/2" radius to prevent chipping

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

Has an overall size of 16" x 21 1/2"

The 3MMV Large Triangular Speed Tip forms an ergonomic 30° angle with the floor for faster welding of flat floor areas

reducing air gaps

Leister 4MM Speed Tip 36" x 4" Straight Arrow Serrated Groover with 1-1/4" Deep Bit creating a clean 1/2" radiusThe speed tip forms an ergonomic 30 angle with the floor for faster welding of flat floor areas. The preheat slot is narrow to focus hot air over the seam area, which helps prevent scorching. For use with round 4mm welding rod only. Works with standard pencil tip nozzles.