Rivets are left headed unground on the surface that increases strength with camelback wood handle

Use an adapter for use with threaded or 1-3/4 In

Allen AEC614F

and a carrying case

Kraft 12" X 14" 1/2"R 1/2"D All Steel Walking Groover With Mounting Bar And Clevis Bracket 16 in. Blue Steel Short Shank Pool Trowel Rivets are left headed ungroundHeavy duty groover cuts clean, smooth professional control joints every time. Uniquely made from the quality steel with a broken in face that won't wear out with extended use like stainless steel. The tool creates a groove in wet cement to control expansion and contraction and relieve stress points. This 12" groover features a bit that has a 3 8" radius and is 1 2" deep. The radius creates a smooth edge to prevent that edge from chipping with wear.