Overview Reviews Product Description Friction fit sleeve to insert into barrel when driving rods or rebar standard center bore is 1”…. Custom bores sixes are also available, call for more information. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × SUMO Fit Sleeve Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *