The side of the staper lists 3 different staple sizes, does it really take all 3? (1/4, 3/8, 1/2 inch)

Arrow T-50 heavy-duty staples 1/4-in to 3/8-inch

Try it 1/2 inch staple. Don't forset in ( push in hard ) try it if the fit only if they slide inn with no problem voila your stappler can holds 1/2 staples if. "not " you have to go smaller than the actul staple you are using.

Swingline 13 Heavy Duty Staples 0 5 Inch Leg Length 90 Page Capacity 1000...

Amazon!

there are 3 different head sizes of rackets. here is an explanation of the different sizes from http://www.dummies.com/how-to/content/choosing-a-tennis-racquet.html

Over-sized: Beginners really like the over-sized and even jumbo frames, which offer between 100 and a whopping 140 square inches of strung surface. Such frames give you a larger sweet spot simply because the hitting surface is bigger, and they allow you to hit the ball farther from the heart of the sweet spot and still make a good shot.

Mid-sized: These racquet heads range from 85 to 100 square inches. Most pro players use frames on the low side of mid-sized - between 85 and 95 square inches. Most recreational players gravitate to the high side of mid-sized - between 95 and 100 square inches. Mid-size racquets offer a great compromise between a larger strung surface and sweet spot and a maneuverable frame that lets you generate good racquet speed when you swing.

Standard-sized heads: Ranging from 80 to 85 square inches, standard-size heads are now obsolete. They give you a smaller strung surface and sweet spot, making it more difficult to produce crisp, clean shots.

Hi,
An easy way to see if the 3/8 " staple would be snug would be measure how much of the 5/8 " staple is up after you use the staple gun. There is 1/4 " difference between the two.
Enjoy,
Wayne

The T50P stapler uses T50 staples of various lengths, including 3/8, 7/16, and 1/2. Is it possible that the 1/2 inch staples you are trying to use are not T50? All T50 staples are the same width and should fit your stapler. There are several other widths of staples that are not T50, although T50 is the most common.

Sue, First, confirm that you have the right size staples. They are sized in two dimensions - width and length. The most common width sizes are T50 and T35. Your stapler and your pack of staples should have a number such as this. Your stapler will accept staples only of the correct width but of various lengths. The lengths are given in fractional inches - 3/8 inch and 1/2 inch are common.
But perhaps your problem is how to open the stapler. It does not swing open like a stapler you would use for papers. Instead, it has a sort of spring piston that has to be removed from the back-end of the stapler. If you lay the stapler down flat on the table so that the hinge of the handle is at the upper left corner, then what I am calling the back-end of the stapler is the lower right corner. Pick up the stapler so that you are looked directly at this back-end. There is a small metal square at this corner that is spring-loaded and is held in place by a little hook. Push in on this metal square as you move it up (or is it down?) to disengage the hook. Now the piston will pull out easily. Put your staples in the hole (they will only go in one way) and replace the piston. I hope you found this helpful Good luck!

Hi Julia,

You have the right size staples. The problem is the length of the refills. Some staplers can't accommodate a full length clip.

Break the staple refill clip in half, then insert it. The shank will be able to close and latch that way.

Best regards
Mike

No the short staples will not have enough holding power. The staples need to allow the siding to hang

Turn the power off. Wait 30 seconds and turn the power back on again. See if there any error codes that pop up on the screen. If there isn't any, the stapler might have returned to the correct position and should work fine now.

If it continues a technician should inspect your finisher section in case the staper section needs to be repaired.