Aside from being entirely made in the USA, the interchangeable nature of Denise hooks and needles opens up lots of unique fibercrafting possibilities.
You can knit with two circular needles of the same size even it you just have one Denise kit. To make a pair of circular needles in the same size, just use the correct size tip on the end held by your right hand. Use a smaller size tip on the left side. This works because your gauge is determined entirely by the right hand tip, which receives the loop and whose circumference determines its size.
If you are a tight knitter and have to work to get the stitches moving along your left needle, just replace it with a smaller size, going down as many as 3 or 4 sizes if you like. See above for an explanation of why this will not change your gauge; only make your knitting easier. Incidentally, this will work in circular knitting only. In rows, you would have to keep switching the tips, making certain you always had the larger tip in the right hand (which you could do).
Try putting a needle a few sizes smaller on the left side. The stitches will slide easily, giving your hands a break and your needles room to fly. Again, this won’t change your gauge, just help you knit faster!
Something went wrong, but you’ve only knit a few rounds or rows, and you’re glad you caught the mistake. Just remove the tip from one end of the cable and all your stitches will slide off so fast you won’t believe it. Unravel, and start fresh.
Many knitters purl more loosely than they knit. This results in uneven stockinette. But with Denise needles, all you have to do is use a smaller tip on the purl side of the circular needle. Do some experimenting, and find out if you need to go down 1, 2, or even 3 sizes. It will vary depending on the yarn and gauge.
A handy tool just the right size! I use a lot of applied I-cord and it is most easily done with a short straight needle. If you have a Denise kit, you have a nice assortment of very short straight needles, that is, all the tips. Just push a rubber needle tip protector on the bottom of the tip to give your very short needle a nice comfy base, and you’ll find it is a great tool for applied I- cord.
To be sure a project is working out as planned, just add a connector and an extra-long cable (30", 40" or 52") to your needle and spread out the stitches. You can step into your garment, check the fit, then remove the extra cord length and go back to knitting away!
Would you like to add shaping to a garment with intricate texture or color work, but not have to insert increases and decreases? It may be gradually shaped by changing tip sizes (which can be done in seconds). For instance, to knit a shaped sweater in the round from the bottom up, begin with a larger tip, shift to the next smaller size to begin shaping, to the next smaller size after another several inches, and so on, then reverse the shaping above the waistline. Sleeves may be shaped in the same way. Row/round count will change a little, but probably not enough to make a significant difference.
If after lots of increasing or decreasing, you need a longer or shorter cable to fit your stitches comfortably, just remove a tip, add a connector and the new cable, slide all stitches to the new cable, remove the connector and old cable, and add the tip to the new cable.
Picking up stitches is easiest with a smaller needle, so use a very small tip to first pick up all stitches, then change to the correct size to begin knitting. Or try the same thing with a Denise crochet hook. It makes neck holes and button bands super easy!