These cable ties are good heavy duty ties with a minimum holding power of 50 lbs. If you want quality, these are it! If you're looking for price, these are not it as you get what you pay for in cable ties!
The mounting hole size is from 9 mm to 10 mm hole or 3/8". If you have a hole that is too wide for traditional 1/4" fir tree ties, these fill the gap perfectly and do no let go!

Avery Dennison is a leader in nylon cable ties making some of the best I have ever used. 

Our range of fir tree ties provide a variety of solutions for automotive fastening applications. The fir tree features allow manufacturers to mount and secure wire bundles to punched or threaded holes, and the disk portion provides adequate tension between the panels to prevent noise and vibration.

To accelerate installation speeds, the fluted edges lock into panel holes the same way a pawl locks into strap teeth.

We have a variety of parts to meet hole diameters from Ø6.3mm to 11.5mm in panel thicknesses from 0.6mm to 8.5mm. Some fir tree parts are also designed specifically for threaded holes from M6-M10.

 
Attribute
Specifications
ApplicationPunched Hole
Fastener TypeStraight Fir Tree
Mating FeatureRound / Hex Hole
Mount SizeØ 9.75 - 10.25 mm
Bundle Diameter0.06 - 1.75" (1.6 - 44.5 mm)
Maximum Panel Thickness≤ 5.0 mm
Operating Temperature-40 to 125°C / -40 to 257°F
ResinPA66 IMHS
ColorBlack
Insertion Force (lbf)

Max.    - 10

Typical  - 6

Retention Force (lbf)

Min.     - 50

Typical - 62

Min. Loop Tensile Strength
50 lbf. (222 N)