Thank you for your review. We do manufacture the boards with extra length as the material contracts as it cools after manufacturing. This does provide for the ends to be squared if necessary. While ArmorGuard deck screws are preferred for installation, other composite deck screws can be used if in stock in the store. The woodgrain pattern on the material is designed for slip-resistance and meets OSHA recommendations for this. However, slipperiness is also influenced by outside factors such as weather (rain, frost, snow, ice) as well as how quickly a person walks, the type of shoe they are wearing, etc. Outdoor mats or anti-skid tapes can help increase traction if necessary.