Its really hard to get them in properly and you risk hurting yourself or bending the handle out of shape with the hammer. As another reviewer pointed out, use #6-32 1 & 1/4 nuts and bolts instead. Buy a pack of 6 ( 99 cents from home depot), you will need the other 4 to resolve the next issue….
https://www.amazon.com/BLACK-DECKER-WM125-Workmate-350-Pound/dp/B000077CQ0