Head clearance is only 1/4" to get into very tight areas. 1-1/2" Reach x 1-1/4" Gap Height. Will not flex even when driving 3/16" rivets. Precision machined from solid billet of tool steel and hardened to resist wear. For use with the ATS-Pro 5011 AND 5022 series Rivet Squeezers. Lifetime ATS-Pro warranty. 2 lbs (1Kg) shipping weight.