For patio construction, the screws should be countersunk to be evenly flush with the decking. The 881/4/1 bit holder with variable screw depth limitation and felt ring allows for a uniform depth and protects the surface from brush marks. Two spare felt rings included.
FEATURES:

• Bit holder for evenly flush countersunk screws in patio construction
• With adjustable screw depth limitation
• Felt ring (exchangeable) prevents brush marks on decking
• Included: 2 spare felt rings